A7V Garrison94 does not list a A7V anchor standard, and MK73 does not list a A7V dagger standard. Garrison96 lists only two A7V stars among the brightest ~300 stars on the sky (V<3.55mag): alf Aql (A7Vnn) and alf Cep (A7Van). Probably the best A7V standards are 21 LMi (HD 87696) and Altair (HD 187642). There is remarkable disagreement between the MK43 and JM53 standards. MK43 standard: alf Aql (Altair) & alf Cep - A7V JM53 standards: tet Cas, iot UMa, & 21 LMi - A7V Abt68 standard: Coma T60 - A7V Cowley69 standards: 21 LMi & iot UMa (A7V), and alf Aql & alf Cep (A7IV-V) Cowley74 standards: 21 LMi, alf Cep, and alf Aql - A7V Houk75 standard: 21 LMi - A7V (primary standard) Cowley76 standard: alf Aql - A7V GrayGarrison89 standards: 2 Hya (A7V), 21 LMi (A7Vn) [see note ***] GrayNstars standards: 2 Hya, 21 LMi (=HR 3974), HD 23156 - A7V *** GrayGarrison89 lists "2 Hyi" as the A7V standard, however "2 Hyi" doesn't exist. Apparently none of the stars in Hydrus (Hyi) have Flamsteed numbers. So I believe this star is actually "2 Hya" as listed above. Gray01/03/06 lists 12 A7V nearby stars. They have median HIP colors of: (A7V) = 0.205 (+-0.010 sem, +-0.031 stdev; N=12) (A7V) = 0.226 (+-0.015 sem, +-0.043 stdev; N=12) For A7V Hipparcos stars within 75pc, with parallax S/N > 8, and within 1 mag of the MS (N=15): (A7V) = 0.214 (+-0.013 sem, +-0.045 stdev; N=15) (A7V) = 0.236 (+-0.017 sem, +-0.055 stdev; N=15) (A7V) = 0.440 (+-0.034 sem, +-0.107 stdev; N=15) (A7V) = 0.515 (+-0.040 sem, +-0.122 stdev; N=15) (A7V) = 0.557 (+-0.051 sem, +-0.130 stdev; N=15) (A7V) = 0.066 (+-0.010 sem, +-0.031 stdev; N=15) (A7V) = 0.052 (+-0.006 sem, +-0.026 stdev; N=15) (A7V) = 0.234 (+-0.011 sem, +-0.044 stdev; N=15) (A7V) =-0.026 (+-0.001 sem, +-0.003 stdev; N=15) (A7V) = 0.771 (+-0.062 sem, +-0.180 stdev; N=4) (B-V)(A7V) = 0.181 ; primary standard 21 LMi (B-V)(A7V) = 0.19 ; JohnsonMorgan53,Johnson66, KenyonHartmann95 (B-V)(A7V) = 0.20 ; Johnson63 (B-V)(A7V) = 0.20 ; Garrison67 (B-V)(A7V) = 0.20 ; Fitzgerald70, Morgan71 (B-V)(A7V) = 0.20 ; SchmidtKaler82 (B-V)(A7V) = 0.200 ; exemplar HD 222603 = HR 8984 = lam Psc (A7V) = 0.205 ; nearby Gray01/03/06 (+-0.010 sem, +-0.031 stdev; N=12) (B-V)(A7V) = 0.210 ; d<60pc SIMBAD A7V N=16 (B-V)(A7V) = 0.213 ; smoothed trend SpT vs (B-V)o B9.5V-F3V 11/2021 (A7V) = 0.214 ; nearby HIP A7V (+-0.013 sem, +-0.045 stdev; N=15) (B-V)(A7V) = 0.214 ; sec. stan. HD 76644 (iot UMa) (B-V)(A7V) = 0.216 ; exemplar HD 99211 = HR 4405 = gam Crt (B-V)(A7V) = 0.22 ; Bessell79 (B-V)(A7V) = 0.221 ; pri. stan. Altair (B-V)(A7V) = 0.233 ; BakisEker22 => adopt (B-V)(A7V) = 0.210 *** [updated 9/24/2020] => adopt (U-B)(A7V) = 0.091 => adopt (V-I)(A7V) = 0.242 => adopt (V-R)(A7V) = 0.117 => adopt (R-I)(A7V) = 0.125 => adopt (V-J)(A7V) = 0.432 => adopt (V-H)(A7V) = 0.488 => adopt (V-Ks)(A7V) = 0.528 => adopt (H-Ks)(A7V) = 0.040 => adopt (J-H)(A7V) = 0.055 (Bp-Rp)(A7V) = 0.2113 ; iot_Tau (Bp-Rp)(A7V) = 0.2622 ; HD_125489 (Bp-Rp)(A7V) = 0.263 ; color trend for B-V=0.210 (Bp-Rp)(A7V) = 0.2767 ; 21_LMi (Bp-Rp)(A7V) = 0.2849 ; lam_Psc (Bp-Rp)(A7V) = 0.2903 ; gam_Crt (Bp-Rp)(A7V) = 0.300 ; Evans18 trend for V-I= 0.242 (Bp-Rp)(A7V) = 0.4852 ; iot_UMa => adopt (Bp-Rp)(A7V)= 0.263 [updated 11/22/2020] (Bp-G)(A7V) = 0.090 ; color trend for B-V=0.210 (Bp-G)(A7V) = 0.1148 ; HD_125489 (Bp-G)(A7V) = 0.1213 ; iot_Tau (Bp-G)(A7V) = 0.1661 ; lam_Psc (Bp-G)(A7V) = 0.1733 ; 21_LMi (Bp-G)(A7V) = 0.1894 ; gam_Crt (Bp-G)(A7V) = 0.4163 ; iot_UMa => adopt (Bp-G)(A7V) = 0.090 [updated 11/22/2020] (G-Rp)(A7V) = 0.0689 ; iot_UMa (G-Rp)(A7V) = 0.0901 ; iot_Tau (G-Rp)(A7V) = 0.1009 ; gam_Crt (G-Rp)(A7V) = 0.1034 ; 21_LMi (G-Rp)(A7V) = 0.1188 ; lam_Psc (G-Rp)(A7V) = 0.1474 ; HD_125489 (G-Rp)(A7V) = 0.173 ; color trend for B-V=0.210 => adopt (G-Rp)(A7V) = 0.173 [updated 11/22/2020] (Ks-W1)(A7V) = 0.047 ; EEM trend for d<30pc for B-V=0.21 => adopt (Ks-W1)(A7V) = 0.047 [updated 12/29/2019] (G-V)(A7V) = -0.060 ; * iot Boo dS* A7V (G-V)(A7V) = -0.055 ; * alf Cir a2* A7VpSrCrEu (G-V)(A7V) = -0.051 ; * del Dor * A7V (G-V)(A7V) = -0.048 ; * 73 Her PM* A7V (G-V)(A7V) = -0.044 ; * lam Mus PM* A7V (G-V)(A7V) = -0.039 ; * lam Psc PM* A7V (G-V)(A7V) = -0.037 ; polynomial fit f(B-V) (G-V)(A7V) = -0.036 ; HD 109536 PM* A7V (G-V)(A7V) = -0.034 ; * 21 LMi dS* A7V(n) (G-V)(A7V) = -0.024 ; HD 156295 PM* A7V (G-V)(A7V) = -0.020 ; HD 172555 PM* A7V (G-V)(A7V) = -0.019 ; fit for A dwarfs from Kervella19 corrected for E(B-V), eval for (V-Ks)=0.528 (G-V)(A7V) = -0.019 ; HD 165190 PM* A7V (G-V)(A7V) = 0.005 ; * tet Cas PM* A7V (G-V)(A7V) = 0.016 ; * M Vel PM* A7V (G-V)(A7V) = 0.057 ; * eps02 Lyr B A7Vn (G-V)(A7V) = 0.094 ; * 59 Dra PM* A7V => adopt (G-V)(A7V) = -0.03 [updated 4/8/2022] (U-B)(A7V) = 0.074 ; primary A7V standard 21 LMi (U-B)(A7V) = 0.08 ; JohnsonMorgan53 (U-B)(A7V) = 0.084 ; primary A7V standard Altair (U-B)(A7V) = 0.090 ; HIP d<75pc S/N>8 A7V N=27 (Mermilliod91 photometry) (U-B)(A7V) = 0.10 ; Fitzgerald70 (U-B)(A7V) = 0.11 ; Johnson66 (V-I)(A7V) = 0.19 ; primary A7V standard 21 LMi (V-I)(A7V) = 0.25 ; Bessell79 (V-I)(A7V) = 0.27 ; primary A7V standard Altair (R-I)(A7V) = 0.132 ; Bessell79 (g-r)(A7V) = 0.081 ; Jordi06 (V-R)=>(g-r) for V-R=0.117 (g-r)(A7V) = -0.016 ; Bilir05 (B-V)=>(g-r) for B-V=0.21 (g-r)(A7V) = -0.02 ; Covey07 => adopt (g-r)(A7V) = -0.02 [updated 10/10/2020] Teff(A7V) = 8000 K ; Bessell79 Teff(A7V) = 7969 K ; pri. stan. 21 LMi (B-V=0.181) Teff(A7V) = 7868 K ; EEM N=117 Teffs Teff(A7V) = 7850 K ; median Teff for 7 A7V from Gray17 Teff(A7V) = 7850 K ; Schmidt-Kaler82 Teff(A7V) = 7840 K ; GrayCorbally94 Teff(A7V) = 7830 K ; GrayCorbally09 Teff(A7V) = 7815 K ; Gray03/06 A7Vs median value from Stassun19/TICv8 (N=6) Teff(A7V) = 7773 K ; exemplar HD 222603 = HR 8984 = lam Psc Teff(A7V) = 7762 K ; Zorec12 median Teff(A7V) = 7723 K ; pri. stan. Altair (B-V=0.221) Teff(A7V) = 7703 K ; sec. stan. HD 76644 (iot UMa; B-V=0.214) Teff(A7V) = 7700 K ; Theodossiou90 Teff(A7V) = 7687 K ; mean photometric Teff (B-V=0.21) Teff(A7V) = 7303 K ; Boyajian12 => adopt Teff(A7V) = 7760 K (logT = 3.890) [updated 9/24/2020] [EEM 9/24/2020: Teff=7760K/B-V=0.21 smoothly fits on A dwarf sequence] BCv(A7V) = 0.049 mag ; Balona94(Teff=7750K, BCv(5772K)=-0.085) BCv(A7V) = 0.046 mag ; Bertone04(ATLAS,Teff=7750, BCv(5772K)=-0.085) BCv(A7V) = 0.025 mag ; Masana06(Teff=7750K, BCv(5772K)=-0.085 BCv(A7V) = 0.024 mag ; Flower96(Teff=7750K, BCv(5772K)=-0.085) BCv(A7V) = 0.015 mag ; EEM trend mid-As BCv(A7V) = 0.010 mag ; Schmidt-Kaler82(BCv=-0.12 + 0.13 offset) BCv(A7V) = 0.009 mag ; exemplar HD 222603 = HR 8984 = lam Psc (Boyajian13) BCv(A7V) = 0.004 mag ; exemplar HD 222603 = HR 8984 = lam Psc (vanBelle08) BCv(A7V) = 0.002 mag ; Bessell98(ATLAS9,logg=4.5,Teff=7750K, BCv(5772K)=-0.085) BCv(A7V) = 0.000 mag ; Code76(Teff=7750K, BCv(5772K)=-0.085) BCv(A7V) = -0.007 mag ; Casagrande18(Teff=7750K,logg=4.5, BCv(5772K)=-0.085) => adopt BCv(A7V) = 0.010 [updated 9/24/2020; that BCv(5772K)=-0.085] logg(A7V) = 4.2 ; median logg for 7 A7V from Gray17 Mv(A7V) = 2.40 mag ; ter. stan. HD 23156 = Cl Melotte 22 158 (Pleiad) Mv(A7V) = 2.33 mag ; sec. stan. iot UMa Mv(A7V) = 2.3 mag ; GrayCorbally09 Mv(A7V) = 2.23 mag ; pri. stan. 21 LMi (HIP2) Mv(A7V) = 2.23 mag ; A dwarf sequence B-V vs. Mv for B-V=0.21 Mv(A7V) = 2.22 mag ; pri. stan. Altair Mv(A7V) = 2.22 mag ; d<60pc SIMBAD A7V (N=16) Mv(A7V) = 2.2 mag ; Schmidt-Kaler82 Mv(A7V) = 2.14 mag ; interp BAF dwarf seq for B-V=0.21 Mv(A7V) = 2.11 mag ; linear B-V vs. Mv fit to d<50pc Gray01/03/06 dwarfs for B-V=0.21 Mv(A7V) = 2.07 mag ; B-V=0.210 => Mv(Wright05) Mv(A7V) = 2.06 mag ; exemplar HD 99211 = HR 4405 = gam Crt (HIP2) Mv(A7V) = 1.98 mag ; d<60pc Mv(B-V=0.21) Mv(A7V) = 1.97 mag ; median Mv for A9V calc using Kervella19 HIP & Gaia DR2 (d<100pc) Mv(A7V) = 1.92 mag ; exemplar HD 222603 = HR 8984 = lam Psc (HIP2) Mv(A7V) = 1.76 mag ; Wegner07 => adopt Mv(A7V) = 2.23 mag [updated 9/24/2020] => adopt M_G(A7V) = 2.19 mag [updated 12/10/2020] (Mv=2.23, G-V=-0.04) => adopt M_Ks(A7V) = 1.702 mag [updated 12/30/2020] (Mv=2.23, V-Ks=0.528) logL(A7V) = 1.334 dex ; Zorec12 median logL(A7V) = 1.000 dex ; Mv=2.23, BCv=0.010 => Mbol = 2.240 => adopt logL(A7V) = 1.000 dex [updated 9/24/2020] => adopt Mbol(A7V) = 2.240 mag [updated 9/24/2020] Rad(A7V) = 1.807 Rsun ; smoothed SpT vs Rad trend A/F dwarfs Rad(A7V) = 1.805 Rsun ; Altair (see below) Rad(A7V) = 1.793 Rsun ; Gray03/06 A7Vs median value from Stassun19/TICv8 (N=6) Rad(A7V) = 1.750 Rsun ; Teff=7760K, logL=1.000 => adopt Rad(A7V) = 1.750 Rsun [updated 9/24/2020] Mass(A7V) = 1.97 Msun ; Zorec12 median Mass(A7V) = 1.791 Msun ; pri. stan. Altair (Monnier09) Mass(A7V) = 1.77 Msun ; pri. stan. Altair (Zorec12) Mass(A7V) = 1.77 Msun ; EEM Mv vs. Mass fit for binaries (Mv=2.07) Mass(A7V) = 1.76 Msun ; EEM Teff vs. Mass fit for binaries (Teff=7800K) Mass(A7V) = 1.76 Msun ; Ekers15 ML calibration for logL=1.065 Mass(A7V) = 1.75 Msun ; EEM logL vs. Mass fit for binaries (logL=1.05) Mass(A7V) = 1.62 Msun ; pri. stan. Altair (David15) => adopt Mass(A7V) = 1.76 Msun [updated 9/16/2019] # No standard Morgan65, MK73, MK78, and Keenan85 do not list A7V standards Skiff08 did not flag any stars as A7V MK standards. # Primary standards HD 87696 = 21 LMi = HR 3974 = HIP 49593 (Ursa Major cluster member) A7V: JM53,Jaschek64(all),Cowley69(stan),Barry70(UVmetal-wk),Cowley74(stan),HoukStand,Jaschek78,Garcia89 *A7Vn: GrayGarrison89(stan),Gray03(A7V(n)) A5III: Levato78 A5: Cannon A9VmA5p lam Boo: Abt95 B-V(HIP)=0.190, dMv=+0.28, d=28pc... hence clearly an unreddened dwarf. GrayGarrison89 list it as their high-vsini A7V standard Strong A7V pedigree (JM53, HoukStand, GrayGarrison, Gray03). Should we be concerned about Abt95's lambda Boo classification? V=4.485+-0.009(Mermilliod91), V=4.49(HIP), B-V=0.181+-0.009(Mermilliod91), U-B=0.074+-0.006(Mermilliod91), V-I=0.19+-0.03(HIP), plx=35.41+-0.18mas(HIP2), plx=37.0336+-0.2931mas(GaiaDR2). Mv=2.23+-0.014(Mermilliod91,HIP2). Teffs: 7292K(GaiaDR2), 7668K(Stevens17#1), 7839K(Gray03), 7870K(Zorec12,Stassun18), 7969K(Stevens17#2), 8000K(Ballering13), 8036K(King03), 8173K(David15), 8250K(Chen14) => = 7969K. HD 187642 = alf Aql = Altair = HR 7557 = HIP 97649 A5: Cannon A5IVn: Abt95 A6Vn: Palmer69 A7: 1897AnHar..28....1M *A7V: MK43(stan),Cowley72(stan),Cowley74(stan),GrayGarrison89(A7Vnn),Garrison96(A7Vnn),Gray03(A7Vn) A7IV-V: JM53(A7IV/V),Jaschek78(JM53),Cowley69(stan) A9V: Barry70 There is broad agreement on A7 subtype, and mostly on luminosity class. Fast-rotating M&M, with Teff at pole around (8710,8450)K and equator (6850,6860)K, depending on the beta of grav-darkening coefficient (Monnier09). B-V=0.221+-0.010(HIP), dMv=+0.08, pi=194mas, so it is very much a "dwarf" at least according to color-mag. MK43,GrayGarrison89,Gray03,JM53,Cowley69 all say "A7". V=0.76(HIP), V=0.765+-0.015(Mermilliod91), B-V=0.221+-0.010(HIP), V-I=0.27+-0.02(HIP), U-B=0.084+-0.022(Mermilliod91), plx=194.95+-0.57mas(HIP2) => Mv = 2.215+-0.016(Mermilliod91,HIP2). PASTEL median values: Teffs: 7361K(Huang15), 7377K(Luck17), 7550K(Erspamer03), 7568K(diBenedetto98), 7646K(AllendePrieto04), 7718K(Schroeder09), 7727K(Zorec12), 7747K(Stassun18), 7780K(Monnier09 average of Teq & Tpole), 7799K(David15), 7800K(Gray03), 8040K(Sokolov95), => = 7723K. [Fe/H]=-0.24(N=1), =4.18(N=2). For BCv=0.03 + V=0.765+-0.015, plx(HIP2) => Mbol=2.25, logL=0.998. For Teff=7639K => Rad = 1.805 Rsun. # Secondary Standard HD 76644 = iot UMa = 9 UMa = HR 3569 = HIP 44127 *A7V: JM53,Jaschek64(all),Cowley67,Cowley69(stan),Barry70,Gray03(A7Vn) A7IV: Morgan72,MK73(dagger),Garcia89,GrayGarrison89 A6V: Palmer68 A5: Cannon B-V(HIP)=0.223, dMv=+0.16... so it is probably a dwarf. V=3.13(HIP), V=3.140+-0.014(Mermilliod91), B-V=0.196+-0.013(Mermilliod91), B-V=0.214+-0.003(TYC), B-V=0.223+-0.003(HIP), plx=68.92+-0.16mas(HIP2), plx=70.6390+-0.6876mas(GaiaDR2) => Mv=2.332+-0.015(Mermilliod91,HIP2). Spectroscopic binary. Basically A7V until ~Morgan72, then A7IV since until Gray03. Beware! M2V component "BC" 3.7" away. Teffs: 6265K(GaiaDR2), 7436K(Stevens17), 7600K(Gebran16), 7703K(Wu11), 7769K(Gray03), 7907K(Zorec12,Stassun18), 8233K(David15) => = 7703K. HD 23156 = Cl Melotte 22 158 = BD+23_495 (Pleiad) *A7V: Jaschek64,Jaschek78(Mendoza56),GrayGarrison89,Grenier99,Gray01,GrayNstars A8V: Atanasijevic58 A9Vs: Adams35 A5: Cannon,Lindblad22 Fairly good agreement on A7V. Only considered a standard by GrayNstars. plx=7.2264+-0.0629 mas (GaiaDR2). V=8.22. Adopt E(B-V)=0.04, Av=0.12 => Mv = 2.40. # Exemplars HD 99211 = HR 4405 = gam Crt = HIP 55705 A3V: Maury1897 A5V: 1955MmMtS..12....1W A6IV: Levato72 *A7V(n): 1978A&AS...35...75C(A7V),GarrisonGray89(A7V),Abt95(A7V),Gray06 A7IV-V: Cowley69 A7IV: DeVaucouleurs57 Physical companion at 5" (see GaiaDR2 motion+parallax). V=4.06(HIP), V=4.071+-0.005(Hauck97), V=4.08(TYC), B-V=0.216+-0.006(HIP), GaiaDR2: plx=38.0906+-0.3570mas. E(B-V)=0.000(Kervella19). For delta(mag)=3.81 => V(AB)=4.071 => V(A)=4.10, V(B)=7.91. Mv=2.00. HD 222603 = HR 8984 = lam Psc = HIP 116928 A6IV-: GrayGarrison89 *A7V: Chalonge52,Slettebak55,Palmer68,Cowley69,Levato72,Cucchiaro78,Levato78,Gray03 A7IV: Abt95 8 A7V classifications in literature. plx=30.59+-0.19mas(HIP2) => D=32.690+-0.203pc, plx=31.7337+-0.3403mas(GaiaDR2). V=4.49(HIP), V=4.500+-0.001(Hauck97), V=4.50(TYC), V=4.502+-0.014(Mermilliod91), B-V=0.200+-0.006(HIP), B-V=0.202+-0.009(Mermilliod91), V-Ic=0.22+-0.02(HIP), U-B=0.078+-0.007(Mermilliod91). Mv=1.928+-0.014. Published Teffs in good agreement: Teff=7646+-190K(Paunzen06), 7668K(Trifonov20), 7734+-80K(Boyajian13), 7766+-70K(Blackwell98), 7779K(Katz11), 7792K(diBenedetto98), 7798+-54K(Zorec12), 8168+-278K(David15) => = 7773K. [Fe/H]=+0.02(Gebran16), logg=4.08(Gebran16). tetLD=0.581+-0.012mas(Boyajian13) => plx(HIP) => R=2.042+-0.044 Rsun. fbol = (40.2200+-0.0933)e-8 erg/s/cm2(Boyajian13) => mbol = 4.4914+-0.0025 (IAU2015 scale). BCv = V - mbol = 4.500 - 4.4914 = +0.0086. fbol = (40.05+-0.24)e-11 W/m2 (vanBelle08) => mbol=4.4960+-0.0065 mag (IAU2015 scale) => BCv = 4.500 - 4.496 = +0.004. HD 32301 = HR 1620 = iot Tau = HIP 23497 A7IV: GrayGarrison89 *A7V: 1940ApJ....91..256T,Slettebak55,Cowley69,Abt95 B-V=0.155, del(Mv)=-0.82, Mv=1.00. HD 125489 = HR 5368 A6V: Palmer68 A7V: Cowley69,GrayGarrison89 *A7Vn: Gray01,Griffin12 F0VmA5p lambda Boo: Abt95 del(Mv)=0.14, Mv=2.17, B-V=0.201. # Deprecated standards HD 71297 = 2 Hya = HR 3321 = HIP 41375 A7V: GrayGarrison89 A3/4IV: Houk99 A5III-IV: Jaschek64(Malorada75),Grenier99 A5: Cannon kA5m: Cowley68 F0VmA6: Abt95 kA8hA9mF0: Abt85 Kennedy83 lists 3 published A5 types GrayGarrison89 lists it as their low-vsini A7V standard Note that GrayGarrison89 say "2 Hyi" in the standard list, but their larger table 2 lists "2 Hya" as being A7V. SIMBAD does not list a "2 Hyi" B-V(HIP)=0.218, dMv=-0.14.. so it is a "dwarf" While GrayGarrison89 list this as an A7V standard, *no one else* has called this an A7V. So perhaps not the best standard? HD 6961 = tet Cas = 33 Cas = HR 343 = HIP 5542 kA6hA7mF0(IV): GrayGarrison89 A7V: JM53,Jaschek64(all),Jaschek78,Garcia89,Hoffleit91 A7IV: Cowley69 A6V: Palmer68 A6IVs: Barry70 A5: Cannon B-V(HIP)=0.170, dMv=-0.67... star is slightly above main sequence So in general, "A7" is agreed upon by JM53 & GrayGarrison89 Probably could be considered "A7IV/V", but maybe not the best standard HD 203280 = alf Cep = HIP 105199 = Alderamin *A7V: MK43,Palmer68,Cowley74(stan),Garrison96(A7Van) A7V-IV: Cowley69(stan),Jaschek78 A7:Vn: Abt95 A8IV: Barry70 A8Vn: Gray03 A5: Cannon Jaschek64 lists mix of (A7V, V-IV, & IV-V) B-V(HIP)=0.257, dMv=-0.73, d=15pc Subtypes shifted a bit A7=>A8 and it appears to be slightly evolved Probably best considered a "A8IV-V", and probably not the best standard Coma T60 A7V: Abt68(stan) (need to follow up) # Other Stars Morgan65 classified one Hyad as A7V: HD 27934. HD 27934 = HR 1387 = kap01 Tau A5V: 1940ApJ....91..256T,Adasm35 A5IV: Palmer68 *A5IV-V: GrayGarrison89 A6V: Abt95 A7V: Slettebak55,Morgan65 A7IV-V: Cowley69 Only Hyad classifed as A7V by Morgan65. del(Mv)=-0.90mag. B-V=0.136. HD 27819 = HR 1380 = 64 Tau A2Vn: Paunzen01 A3: Maury1897,Ljunggren61IV: Palmer68 A5III: Cucchiaro80 A6V: 1940ApJ....91..256T A7IV: GrayGarrison89 *A7V: Slettebak55,Cowley69,Gray01 A7.5V: Morgan65 A8V: Abt95 A9V: Adams35 F0: 1920AN....211..289K Only Hyad classified A7.5V by Morgan65. B-V=0.154, Mv=1.33, del(Mv)=-0.49. HD 138268 = HR 5756 A A5Vn: Wilson50(SB2) A7V: 1977AJ.....82..431L,Corbally84 *A7Vn: Cowley76,Abt95 A8V: Cowley69 11" pair. HD 27084 = HR 1330 A7V: Cowley69,1987ApJS...64..241S A7IV: Abt95 *A7IV-V: GrayGarrison89 HD 39014 = HR 2015 A6V: 1937AnHar.105...45H A7IV: Houk75(Garrison type) A7IVn: Levato72 A7V: 1955MmMtS..12....1W,Houk75(MSS type) *A7V+n: GrayGarrison89 A9V: Abt95 B-V=0.217, del(Mv)=-1.07, Mv=1.03. HD 196078 = HR 7865 A7V: Cowley69,Abt95,GrayGarrison89(A7V+) All three classifications A7 dwarf. HD 202128 = HR 8116 A3V: Wilson52(close pair) A5V: Abt81 A7V: Christy69 *A7Vn: Cowley69,Abt95