M8.5V Kirkpatrick(in GrayCorbally09) lists TVLM 513-46546 as the primary M8.5V standard, and cites Kirkpatrick95 as the reference. Kirkpatrick91 standard: GJ 569B - M8.5V (primary standard) Kirkpatrick95 standard: TVLM 513-46546 - M8.5V Henry02 standard: TVLM 513-46546 - M8.5V (cites Kirkpatrick95) Henry04 standard: SCR 1845-6357 (primary standard) Kirkpatrick(GrayCorbally09): TVLM 513-46546 (primary standard) RECONS list shows SCR 1845-6357A as the nearest M8.5V star, followed by DENIS J1048-3956. Kirkpatrick95 listed an original batch of 3 M8.5Vs: CTI 012657.5+280202, Gl 569B, TVLM 513-46546. Kirkpatrick12 lists 4 M8.5V stars within 8 pc (SCR J1845-6357 A, DENIS-P J104814.7-395606.1, LSR J1835+3259, Gl 752 B, GJ 2005 B), although GJ 752B = VB 10 is M8V standard. Unfortunately GJ 2005 B is tight companion in quadruple. ReinersBasri09 finds that the mean kinematic age of nearby M7-M9.5 stars is 3.1 Gyr. (V-Ks)(M8.5V) = 7.61 ; 2MASS_J03350208+2342356 M8.5(Li) (Dahn17) (V-Ks)(M8.5V) = 8.285 ; exemplar Ruiz 207-61 = ESO 207-61 (V-Ks)(M8.5V) = 8.81 ; trend fit to Dahn17 for M8.5V (V-Ks)(M8.5V) = 8.85 ; smoothed fit to Dieterich SpT vs V-Ks (V-Ks)(M8.5V) = 8.892 ; sec. stan. SCR 1845-6357 (V-Ks)(M8.5V) = 8.895 ; halfway M8V(8.73) and M9V(9.06) (V-Ks)(M8.5V) = 8.92 ; exemplar DENIS J1048-3956 (nearest middle in M_Ks and M_G) (V-Ks)(M8.5V) = 8.924 ; pri. stan. TVLM 513-46546 (V-Ks)(M8.5V) = 9.10 ; exemplar LSR J1835+3259 (Burgasser14) => adopt (V-Ks)(M8.5V) = 8.90 [updated 8/17/2020] => adopt (V-J)(M8.5V) = 7.745 => adopt (V-H)(M8.5V) = 8.437 => adopt (J-H)(M8.5V) = 0.693 (G-Ks)(M8.5V) = 5.136 ; exemplar LSR J1826+3014 (G-Ks)(M8.5V) = 5.515 ; sec. stan. SCR J1845-6357 (G-Ks)(M8.5V) = 5.573 ; exemplar DENIS J104814.6-395606 (G-Ks)(M8.5V) = 5.578 ; exemplar DENIS J235359.4-083331 (G-Ks)(M8.5V) = 5.653 ; exemplar Ruiz 207-61 = ESO 207-61 (G-Ks)(M8.5V) = 5.667 ; smooth trend M7V-M9V (G-Ks)(M8.5V) = 5.67 ; M_G=15.97, M_Ks=10.30 (G-Ks)(M8.5V) = 5.670 ; halfway between pri. & sec. stan. (G-Ks)(M8.5V) = 5.698 ; exemplar LSR J1835+3259 (G-Ks)(M8.5V) = 5.824 ; pri. stan. TVLM 513-46546 (G-Ks)(M8.5V) = 5.828 ; exemplar CTI 012657.5+280202 => adopt (G-Ks)(M8.5V) = 5.67 [updated 12/27/2021; M_G=15.97, M_Ks=10.30] (r-i)(M8.5) = 1.910 (+-0.05 rms) ; West05 fit for (V-Ic)=4.63 (i-z)(M8.5V) = 1.770 ; poly fit to d<75pc SIMBAD M dwarfs for G-Ks=5.67 => adopt (i-z)(M8.5V) = 1.77 [updated 12/27/2021] (z-J)(M8.5V) = 2.242 (+-0.053 rms) ; poly fit to d<50pc M dwarfs for G-Ks=5.67 => adopt (z-J)(M8.5V) = 2.24 [updated 12/27/2021] (V-Ic)(M8.5V) = 4.61 ; pri. stan. TVLM 513-46546 (V-Ic)(M8.5V) = 4.63 ; trend Dieterich14 SpT vs. V-Ic (V-Ic)(M8.5V) = 4.94 ; sec. stan. SCR 1845-6357 => adopt (V-Ic)(M8.5V) = 4.63 [updated 7/4/2020] (B-V)(M8.5V) = 2.16 ; linear fit to Leggett92 (B-V=0.8367+0.2852*V-I, V-I=4.63) => adopt (B-V)(M8.5V) = 2.16 [updated 7/5/2020] (J-H)(M8.5V) = 0.685(+-0.010 sem,+-0.021 stdev) ; N=6 M8.5V Cruz03 (J-H)(M8.5V) = 0.693 ; EEM trend for V-Ks=8.90 => adopt (J-H)(M8.5V) = 0.69 [updated 8/6/2020] (H-Ks)(M8.5V) = 0.463 ; EEM trend for V-Ks=8.90 (H-Ks)(M8.5V) = 0.464(+-0.033 sem,+-0.068 stdev) ; N=6 M8.5V Cruz03 (H-Ks)(M8.5V) = 0.467 ; trend of Dieterich14 data for V-Ks=8.90 => adopt (H-Ks)(M8.5V) = 0.465 [updated 11/1/2019] (J-Ks)(M8.5V) = 1.161(+-0.017 sem,+-0.045 stdev) ; N=6 M8.5V Cruz03 (Ks-L')(M8.5V) = 0.398 ; Dupuy12 polynomial (Ks-W1)(M8.5V) = 0.364 ; sec. stan. SCR 1845-6357/WISE (Ks-W1)(M8.5V) = 0.358 ; sec. stan. SCR 1845-6357/allWISE (Ks-W1)(M8.5V) = 0.354 ; pri. stan. TVLM 513-46546/WISE (Ks-W1)(M8.5V) = 0.349 ; Dupuy12 median (N=5; d<50pc) (Ks-W1)(M8.5V) = 0.347 ; pri. stan. TVLM 513-46546/allWISE (Ks-W1)(M8.5V) = 0.343 ; Avenhaus12 for V-Ks=8.90 (Ks-W1)(M8.5V) = 0.317 ; fit to Winters15 data for V-Ks=8.90 (Ks-W1)(M8.5V) = 0.304 ; Dupuy12 trend => adopt (Ks-W1)(M8.5V) = 0.31 [updated 12/28/2019] (Bp-Rp)(M8.5V) = 5.0312 ; TVLM_513-46546 pri. stan. (Bp-Rp)(M8.5V) = 5.0633 ; Ruiz 207-61 = ESO 207-61 exemplar (Bp-Rp)(M8.5V) = 5.105 ; M5-M8.5 color trend (Bp-Rp)(M8.5V) = 5.1423 ; SCR_J1845-6357 sec. stan. (Bp-Rp)(M8.5V) = 5.1597 ; LSR J1835+3259 exemplar (2MASSI_J1835379+325954) => adopt (Bp-Rp)(M8.5V) = 5.10 [updated 11/18/2020] [EEM note that M8.5V appears to have the reddest Bp-Rp colors, they go bluer both hotter and cooler] (G-Rp)(M8V) = 1.57 ; M8V adopted (G-Rp)(M8.5V) = 1.5727 ; SCR J1845-6357 sec. stan. (G-Rp)(M8.5V) = 1.581 ; M6.5-L2 color trend (G-Rp)(M8.5V) = 1.584 ; Ruiz 207-61 = ESO 207-61 exemplar (G-Rp)(M8.5V) = 1.5846 ; LSR J1835+3259 exemplar (2MASSI_J1835379+325954) (G-Rp)(M8.5V) = 1.587 ; color trend M0V-M9V (G-Rp)(M9V) = 1.59 ; M9V adopted (G-Rp)(M8.5V) = 1.6027 ; TVLM_513-46546 pri. stan. (G-Rp)(M8.5V) = 1.6197 ; Ruiz 207-61 = ESO 207-61 exemplar => adopt (G-Rp)(M8.5V) = 1.59 [updated 11/18/2020] (Bp-G)(M8.5V) = 3.4285 ; TVLM_513-46546 pri. stan. (Bp-G)(M8.5V) = 3.4436 ; Ruiz 207-61 = ESO 207-61 exemplar (Bp-G)(M8.5V) = 3.51 ; Bp-Rp=5.10, G-Rp=1.59 (Bp-G)(M8.5V) = 3.5696 ; SCR J1845-6357 sec. stan. (Bp-G)(M8.5V) = 3.5751 ; LSR J1835+3259 exemplar => adopt (Bp-G)(M8.5V) = 3.51 [updated 11/18/2020; Bp-Rp=5.10, G-Rp=1.59] (G-V)(M8.5V) = -3.40 ; exemplar LSR J1835+3259 (G-V)(M8.5V) = -3.377 ; sec. stan. SCR J1845-6357 (G-V)(M8.5V) = -3.332 ; exemplar Ruiz 207-61 = ESO 207-61 (G-V)(M8.5V) = -3.23 ; M_G=15.97, Mv=19.20 (G-V)(M8.5V) = -3.100 ; pri. stan. TVLM_513-46546 (G-V)(M8.5V) = -3.09 ; trinomial trend through late Ms => adopt (G-V)(M8.5V) = -3.23 [updated 12/27/2021] M_G(M8.5V) = 16.38 ; pri. stan. TVLM 513-46 M_G(M8.5V) = 16.10 ; 2MASS J20103539+0634367 = LSPMJ2010+0632B (single M8.5 classification) M_G(M8.5V) = 16.09 ; exemplar LSR J1835+3259 M_G(M8.5V) = 16.04 ; exemplar CTI 012657.5+280202 M_G(M8.5V) = 16.01 ; sec. stan. SCR J1845-6357 M_G(M8.5V) = 15.99 ; exemplar DENIS J104814.6-395606 M_G(M8.5V) = 15.97 ; M_Ks=10.30, G-Ks=5.67 M_G(M8.5V) = 15.96 ; 2MUCD 10984 (single M8.5 classification) M_G(M8.5V) = 15.93 ; trend SIMBAD d<10pc sample M_G(M8.5V) = 15.94 ; nearest 10 M8.5Vs in SIMBAD, median M_G(M8.5V) = 15.87 ; d<25pc SIMBAD (N=20 median) M_G(M8.5V) = 15.85 ; exemplar Ruiz 207-61 M_G(M8.5V) = 15.72 ; exemplar LSR J1826+3014 M_G(M8.5V) = 15.41 ; trend for late Ms within 20pc M_G(M8.5V) = 15.82 ; exemplar DENIS J235359.4-083331 => adopt M_G(M8.5V) = 15.97 [updated 12/27/2021; M_Ks=10.30, G-Ks=5.67] Teff(M8.5V) = 2559 K ; Dupuy17(SaumonMarley08 scale) Teff(M8.5V) = 2559 K ; Dupuy17(Lyon model scale) Teff(M8.5V) = 2500 K ; non. stan. DENIS J1048-3956 Teff(M8.5V) = 2475 K ; halfway between M8V(2550K) and M9V(2400K) Teff(M8.5V) = 2467 K ; Filippazzo15 calibration (M6V-T9V) Teff(M8.5V) = 2444 K ; interp. M8V(V-K=8.73,T=2550K) and M9V(V-K=9.00,T=2400K) Teff(M8.5V) = 2441 K ; Golimowski04 Teff(M8.5V) = 2420 K ; empirical L-R relation, for logL=-3.472 Teff(M8.5V) = 2400 K ; non. stan. SDSS J2255-0034 (single Teff from Golimowki04) Teff(M8.5V) = 2400 K ; Rajpurohit18 N=2 M8.5Vs Teff(M8.5V) = 2400 K ; Cifuentes20 for CARMENES M8.5V(N=4) Teff(M8.5V) = 2398 K ; pri. stan. TVLM 513-46546 (Dieterich14) Teff(M8.5V) = 2300 K ; pri. stan. TVLM 513-46546 (single Teff from Golimowski04) => adopt Teff(M8.5V) = 2420 K (logT = 3.384) [updated 11/3/2019] BC_K(M8.5V) = 3.18+-0.07 ; non. stan. SDSS J2255-0034 (Golimowski04) BC_K(M8.5V) = 3.16+-0.07 ; pri. stan. TVLM 513-46546 (Golimowski04) BC_K(M8.5V) = 3.122 ; Golimowski04 BC_Ks(M8.5V)= 3.12 ; interp M6V-L1V for V-Ks=8.90 BC_K(M8.5V) = 3.119 ; TVLM 513-46546 (Leggett01, IAU scale, see below) BC_Ks(M8.5V)= 3.074 ; Filipazzo15 (field) => adopt BC_K(M8.5V) = 3.12 mag [updated 11/3/2019] BCv(M8.5V) = -5.78 ; BC_K=3.12, V-K=8.90 => adopt BCv(M8.5V) = -5.78 mag [updated 11/3/2019] Mv(M8.5V) = 19.47 ; sec. stan. SCR 1845-6357 Mv(M8.5V) = 19.50 ; exemplar LSR J1835+3259 = 2MASS J18353790+3259545 Mv(M8.5V) = 19.505 ; pri. stan. TVLM 513-46546 Mv(M8.5V) = 19.20 ; V-Ks=8.9, M_Ks=10.3 Mv(M8.5V) = 19.14 ; EEM fit to Dieterich14 data V-K=8.92 => adopt Mv(M8.5V) = 19.20 [updated 11/1/2019; M_Ks=10.3, V-Ks=8.9] M_Ks(M8.5V) = 10.582 ; exemplar LSR J1826+3014 M_Ks(M8.5V) = 10.581 ; pri. stan. TVLM 513-46546 M_Ks(M8.5V) = 10.497 ; sec. stan. SCR 1845-6357 M_Ks(M8.5V) = 10.46 ; Dupuy12 mean M_Ks(M8.5V) = 10.420 ; exemplar DENIS J1048-3956 M_Ks(M8.5V) = 10.405 ; exemplar LSR J1835+3259 M_Ks(M9V) = 10.40 ; adopted for M9V M_Ks(M8.5V) = 10.38 ; EEM fit to Reid CNS3 data for V-Ks=8.90 M_Ks(M8.5V) = 10.27 ; interp M8V-M9V V-Ks vs. M_Ks M_Ks(M8.5V) = 10.26 ; EEM fit to Dieterich14 data for V-Ks=8.90 M_Ks(M8.5V) = 10.24 ; exemplar DENIS J235359.4-083331 M_Ks(M8.5V) = 10.22 ; exemplar CTI 012657.5+280202 M_Ks(M8.5V) = 10.20 ; exemplar Ruiz 207-61 M_Ks(M8V) = 10.00 ; adopted for M8V M_Ks(M8.5V) = 9.94 ; Dupuy12 polynomial => adopt M_Ks(M8.5V) = 10.30 [updated 11/1/2019; Mv=19.2, V-Ks=8.9] logL(M8.5V) = -3.472 ; M_Ks = 10.30, BC_Ks=3.12 =>Mbol= 13.420 logL(M8.5V) = -3.50+-0.14 ; non. stan. SDSS J2255-0034 (Golimowski04) logL(M8.5V) = -3.59+-0.02 ; pri. stan. TVLM 513-46546 (Golimowski04) logL(M8.5V) = -3.602 ; pri. stan. TVLM 513-46546 (Dieterich14) logl(M8.5V) = -3.65 ; pri. stan. TVLM 513-46546 (Leggett01) => adopt logL(M8.5V) = -3.472 dex [updated 11/3/2019] => adopt Mbol(M8.5V) = 13.420 mag [updated 11/3/2019] Mass(M8.5V) = 0.079+-0.020 Msun ; GJ 2005B (Benedict16) Mass(M8.5V) = 0.0797 Msun ; Mann18 calib for M_Ks=10.30 => adopt Mass(M8.5V) = 0.080 Msun [updated 11/3/2019] Rad(M8.5V) = 0.10448 Rsun ; logL=-3.472, Teff=2420K => adopt Rad(M8.5V) = 0.104 Rsun [updated 11/3/2019] # No Standards Boeshaar85 and Kirkpatrick97 do not list an M8.5V standard # Primary Standard TVLM 513-46546 = 2MASSI J1501081+225001 = WISEP J150108.17+225001.4 M8e: Martin94 *M8.5V: Kirkpatrick95,Leggett01,Henry02,Geballe02,Kirkpatrick11 M9V: Henry04, West11(M9e) M9.5V: BardalezGagliuffi14(near-IR) Not listed by Hawley97 or Reid04. The only M8.5V standard listed by Henry02, and one of the first M8.5Vs (among 3 listed by Kirkpatrick95). V=19.63+-0.021(Dieterich14), Rc=17.39+-0.006(Dieterich14), Ic=15.02+-0.018(Dieterich14), V-Ic=4.61(Dieterich14), I=15.09(Tinney93), R-I=2.36(Tinney93), K=10.77(Tinney93). 2MASS: J=11.866+-0.022, H=11.181+-0.030, Ks=10.706+-0.024 => V-Ks=8.924(Dieterich14,2MASS), M_Ks=10.581+-0.028. WISE: W1=10.352+-0.022, W2=10.053+-0.020, W3=9.618+-0.029. allWISE: W1=10.359+-0.022, W2=10.066+-0.020, W3=9.596+-0.033. Ks-W1=0.354(WISE), Ks-W1=0.347(allWISE). Mv=19.505+-0.025(Dieterich14,Dahn02). In SDSS DR8 & WISE. Mbol=13.73+-0.08(Golimowski04), BC_K=3.16+-0.07(Golimowski04), logL=-3.59+-0.02(Golimowski04,Berger06), logL=-3.602+-0.009(Dieterich14). f_bol = 7.43e-14 W/m2 (Leggett01) => mbol = 13.825 (IAU2015 scale) => BC_Ks = 13.825 - 10.706 = 3.119. plx=94.4+-0.60(Dahn02). Teffs: 2300K(Golimowski04), 2398+-36K(Dieterich14) => 2400K. GaiaEDR3: plx=93.4497+-0.1945mas, G=16.5301+-0.0009, E(BR/RP)=1.895, Bp-Rp=5.0312, Bp-G=3.4285, G-Rp=1.6027. (G-Ks)=5.824, M_G=16.383, M_Ks=10.559, G-V = 16.5301 - 19.63 = -3.100. # Secondary Standard SCR J1845-6357 = 2MASS J18450541-6357475 = DENIS-P J184504.9-635747 *M8.5V: Henry04(pri. stan.),Winters11 Very high proper motion (pmRA, pmDec = 2584, +589 mas/yr ; GaiaDR2). Has T6 dwarf companion SCR 1845-6357B at separation 1.2" (discovered by Biller), so the photometry - especially IR - will be contaminated. RECONS list shows this to be the nearest M8.5V. V = 17.40 (Winters11), R = 14.99(Winters11), I = 12.46(Winters11), J = 9.544+-0.023(2MASS), H = 8.967+-0.027(2MASS), Ks = 8.508+-0.020(2MASS). V-Ic=17.40-12.46 = 4.94(Winters11), V-Ks = 17.40 - 8.508 = 8.892. WISE: AllWISE: plx = 259.45+-1.11 mas (Henry06), 246.59+-1.39mas(Weinberger16), plx=249.9187+-0.1551mas(GaiaDR2). Mv = 19.47(Winters11,Henry06), M_Ks= 10.578+-0.022 (2MASS, Henry06). There are ROSAT and XMM X-ray detection within ~1', which may be SCR 1845-6357. WISE: W1=8.144+-0.022, W2=7.809+-0.021, W3=7.384+-0.016, W4=7.080+-0.072. AllWISE: W1=8.150+-0.023, W2=7.797+-0.021, W3=7.376+-0.017, W4=7.041+-0.084. Ks-W1=0.364(WISE), Ks-W1=0.358(allWISE). SCR J1845-6357 GaiaDR2: G=14.0228+-0.0005, E(BR/RP)=1.841, Bp-Rp=5.1423, Bp-G=3.5696, G-Rp=1.5727. (G-Ks)=5.515, M_G=16.012, M_Ks=10.497. G-V = 14.0228 - 17.40 = -3.377. # Exemplars DENIS J104814.6-395606 M8V: Geballe02(M8Ve),Reid08,Lurie14,Burgasser15 *M8.5Ve: Henry04(Kirkpatrick12) M9V: Delfosse01,Schmidt07,Faherty09,Rajpurohit13 L0: Bouy03 Majority of classifications are M8 or M9 or in between. Has M_G and M_Ks in middle of distribution among standards+exemplars. V=17.37(Winters15), J=9.538+-0.022(2MASS), H=8.905+-0.044(2MASS), Ks=8.447+-0.023(2MASS), V-Ks=8.92(Hosey15), plx=248.08+-0.61mas(Lurie14), M_Ks=10.420+-0.024(2MSS,Lurie14), Mv=19.34. Teff=2500K(Rajpurohit13). (G-Ks)=5.573, M_G=15.985, M_Ks=10.412. CTI 012657.5+280202 = 2MASS J01273917+2805536 = 2MASSI J0127391+280553 *M8.5V: Kirkpatrick92(PhD),Kirkpatrick94,Kirkpatrick95,Cruz03,Kirkpatrick11 M9.0: Jenkins09 M9.3: BardalezGagliuffi14(near-IR) One of the first M8.5Vs in literature (among first 3 in Kirkpatrick95). In the direction of And XXII dwarf galaxy. plx=30.5+-0.5mas(Dahn02), plx=29.6431+-0.3829mas(GaiaDR2). G=18.6838+-0.0042(GaiaDR2) [but no GaiaDR2 colors] J=14.044+-0.029(2MASS), H=13.357+-0.030(2MASS), Ks=12.856+-0.031(2MASS) => M_G=16.043+-0.028, M_Ks=10.216+-0.042. (G-Ks) = 18.6838 - 12.856 = 5.828. LSR J1835+3259 = 2MASS J18353790+3259545 M8: RoyasAyala12(K-band) *M8.5V: Reid03,Cruz03,Reid07(M8.5e),Kirkpatrick12 M9Ve: Lepine03 V=18.27(Reid04), J=10.270+-0.022, H=9.617+-0.021, Ks=9.171+-0.018(2MASS), V-Ks=9.099(Reid04,2MASS), plx=176.5+-0.5 mas(Reid03), Mv=19.50(Reid03,Reid04), M_Ks=10.405+-0.019(2MASS,Reid03). plx=175.8244mas(GaiaDR2), Mv=19.50. G=14.8692, G-V = 14.8692 - 18.27 = -3.40. M_G=16.0946. Bp-Rp=5.1597, Bp-G=3.5751, G-Rp=1.5846. (G-Ks)=5.698, M_G=16.094, M_Ks=10.396. Ruiz 207-61 = ESO 207-61 = LEHPM 2-436 = 2MASS J07075327-4900503 M8e: Martin94(M8e),Schmidt07,Faherty09(M8),BardalezGagliuffi14(near-IR) *M8.5V: Kirkpatrick(unpub.,DwarfArchives),Lodieu05,Reid08,Kirkpatrick11,Burgasser15 M8.8: BardalezGagliuffi14(SpeX) M9V: Ruiz91(M9:), Henry04(M9V:) Discovered by Ruiz91. V=19.47(SPM4,photographic?), V=20.39(vanAltena95), V=20.99(Jenkins09), V=21.09+-0.035(Dieterich14), V=21.20(Winters15) => adopt V = 21.09. plx=66.1+-4.0mas(vanAltena95), plx = 40.98+-1.63mas(Weinberger16), J=13.228+-0.026(2MASS), H=12.538+-0.030(2MASS), Ks=12.105+-0.026(2MASS). RV = 116.4 km/s (Malaroda06). V-Ks = 21.09 - 12.105 = 8.985 (Dieterich14,2MASS). Mv = 19.15+-0.09 (Dieterich14, Wienberger16), M_Ks = 10.17+-0.09 (2MASS, Wienberger16). GaiaDR2: plx=41.5706+-0.1468mas, G=17.7576+-0.0018, E(BR/RP)=1.924, Bp-Rp=5.0633, Bp-G=3.4436, G-Rp=1.6197. V-Ks = 21.09 - 12.105 = 8.285. (G-Ks)=5.653, M_G=15.852, M_Ks=10.199. G-V = 17.7576 - 21.09 = -3.332. DENIS J235359.4-083331 = 2MASS J23535946-0833311 *M8.5e: PhanBao06(optical) M8.6: BaradalezGagliuffi14(SpeX) GaiaEDR3: plx=45.7576+-0.1495mas, G=17.5174, E(BP/RP)=1.838, Bp-Rp=4.807805, Bp-G=3.229822, G-Rp=1.577983. J=13.033+-0.026(2M), H=12.369+-0.024(2M), Ks=11.932+-0.027. (G-Ks)=5.578, M_G=15.818, M_Ks=10.240. LSR J1826+3014 = 2MASS J18261131+3014201 *M8.5V: Lepine02 d/sdM8.5: BardalezGagliuffi14(near-IR) M9.9: BardalezGagliuffi14(SpeX) Lepine02 says Vtan=175+-25 km/s => "halo-like Galactic orbit". Using GaiaEDR3, I estimate Vtan=125.9km/s. V=19.36(Lepine02), J=11.659+-0.020(2M), H=11.175+-0.016(2M), Ks=10.811+-0.019(2M), V-Ks = 19.36 - 10.811 = 8.549. GaiaEDR3: plx=90.0858+-0.0832mas, G=15.947, E(BP/RP)=1.797, Bp-Rp=5.239894, Bp-G=3.678928, G-Rp=1.560966. (G-Ks)=15.947 - 10.811 = 5.136, M_G=15.716, M_Ks=10.582. # Deprecated Standards GJ 569Bab *M8.5V: HenryKirkpatrick90,Kirkpatrick91(stan) M8.5+M9: Leggett01 M8.5+M9.5/L3: Kenworthy01 M9+M9: Martin06 Unresolved 0.1" pair of M8.5+M9 stars (see WDS), 5" away from M2.5V primary GJ 569A. Presumably the reason this star was dropped as the primary standard between Kirkpatrick91 and Kirkpatrick(GrayCorbally09) is its binarity? GJ 569B was first reported by Forrest, Skrutskie, & Shore (1998). Henry & Kirkpatrick (1990) "conclude that the spectrum of Gl 569B from 6320 to 9170 A indicates that it is hotter than LHS 2924. Gl 569B falls between VB 10 [M8V] and LHS 2924 [M9V] in spectral characteristics... We assign Gl 569B a spectral type of M8.5." Bower09 reports V(B)=18.10. 2MASS survey only has primary star 5" away. # Other Stars PSS 1458+2839 = 2MASS J14582453+2839580 M8: Reid08,Faherty09 *M8.5V: Kirkpatrick11,BardalezGagliuffi14(M8.5,near-IR) M9e: West11 No Vmag, no plx, no Teff estimates. Ks=11.849+-0.024(2MASS). GaiaDR2: plx=41.1852+-0.1868mas, G=17.5739 0.0012, Bp-Rp=4.8612, Bp-G=3.2859, G-Rp=1.5752. M_Ks=9.92+-0.03, M_G = 15.648+-0.010. HB 2115-4518 = 2MASS J21183174-4505522 = GCTP 5120.11 = [HB88] M18 *M8.5V: Lodieu05(M8.5e),Kirkpatrick11 M8/9:V: Hawkins88 plx = 33.6+-5.7mas(vanAltena95),46.7+-7.9mas(Tinney96). No published Vmag, Teff. HB 2126-4459 = 2MASS J21300862-4446278 = [HB88] M20 *M8.5V: Kirkpatrick11 No published Vmag, Teff. plx = 37.0+-16.0mas(Tinney96). TVLM 262-111511 *M8.5V: Kirkpatrick(unpub.,DwarfArchives),Kirkpatrick11 M8: West08(M8e), West11 No published Vmag. SDSS J2255-0034 = SDSS J225529.09-003433.4 M8.5: Geballe02(Golimowski04) plx=16.19+-2.59mas(Vrba04). Teff: 2400K(Golimowski04) # V-K vs. Mv data V-K Mv M_Ks SpT(M) Name 8.69 18.52 9.832+-0.070 8.5 non-stan. LHS 2397AAB (see Dieterich14; plx=65.83+-2.02mas) 8.75 18.80 10.047+-0.045 8.5 non-stan. DENIS_J0306-3647 (see Dieterich14; plx=76.46+-1.42mas) 8.892 19.47 10.578+-0.022 8.5 sec. stan. SCR_J1845-6357 8.92 19.34 10.420+-0.024 8.5 non-stan. DENIS_J1048-3956 8.924 19.505 10.581+-0.028 8.5 pri. stan. TVLM 513-46546 8.985 19.15 10.17+-0.09 8.5 non-stan. ESO 207-61 9.099 19.50 10.405+-0.019 8.5 non-stan. LSR_J1835+3259 => adopt 8.92 19.14 10.22 (fit to color-abs mag data) M_Ks M_G G-Ks SpT 9.239 14.309 5.016 7.5 pri. stan. LHS 2632 = LP 321-222 9.573 14.723 5.150 7.5 exemplar 2MASS J15242475+2925318 = LSPM J1524+2925 9.788 15.087 5.299 7.5 sec. stan. LHS 132 = LP 938-71 9.83 15.05 5.223 7.5 exemplar 2MASS J22215313+1158222 9.428 14.61 5.179 8.0 exemplar LHS 2243 = LP 315-53 9.788 15.09 5.299 8.0 exemplar LHS 132 = LP 938-71 10.030 15.46 5.430 8.0 exemplar LEHPM 2-381 = SSSPM J2052-4759 9.666 15.11 5.444 8.0 exemplar LP 771-21 9.789 15.26 5.472 8.0 exemplar CE 303 = SIPS J1309-2330 = 2MASS J13092185-2330350 9.810 15.30 5.488 8.0 sec. stan. LP 412-31 = NLTT 10644 9.904 15.46 5.556 8.0 pri. stan. VB 10 10.56 16.21 5.654 8.0 exemplar RG 0050-2722 = 2MASS J00525468-2705597 9.696 15.37 5.674 8.0 exemplar LEHPM 2-183 = DENIS J051737.7-334903 9.945 15.63 5.682 8.0 sec. stan. LHS 2397a = LP 732-94 10.199 15.852 5.653 8.5 exemplar Ruiz 207-61 10.216 16.043 5.827 8.5 exemplar CTI 012657.5+280202 10.240 15.818 5.578 8.5 exemplar DENIS J235359.4-083331 10.396 16.094 5.698 8.5 exemplar LSR J1835+3259 10.412 15.985 5.573 8.5 exemplar DENIS J104814.6-395606 (appears to be near middle of distribution) 10.497 16.012 5.515 8.5 sec.stan. SCR J1845-6357 10.559 16.383 5.824 8.5 pri.stan. TVLM 513-46546 10.582 15.716 5.134 8.5 exemplar LSR J1826+3014 10.17 15.93 5.760 9.0 exemplar BRI 1222-1222 10.54 16.43 5.886 9.0 pri. stan. LHS 2924 10.07 15.96 5.891 9.0 exemplar TVLM 868-110639 10.51 16.43 5.917 9.0 sec. stan. LP 944-20 10.30 16.23 5.924 9.0 exemplar LP 647-13 10.25 16.22 5.967 9.0 sec. stan. LHS 2065 10.054 16.111 6.057 9.5 pri. stan. BRI 0021-0214 ... 16.12 ... 9.5 exemplar PC 0025+0447 10.32 16.16 5.845 9.5 exemplar WISE J072003.20-084651.2 10.567 16.363 5.796 9.5 exemplar G 216-7B 10.565 16.682 6.117 10.0 pri.stan. 2MASS J03454316+2540233