MK Standard Stars Online

CTIO 2.6 angstrom resolution


This database contains 2.6 angstrom resolution spectra
of selected MK standard spectral types.
All are centered in the blue-violet from approximately 3800A to 5200A
All available standards on this page were observed at the CTIO 1.5m

Star Names enclosed in parentheses ( ) are not specifically MK standards, but fit well as that spectral type, determined by R. O. Gray

Stars qualified by an (n) contain broadened absorption features due to rapid rotation.


SpT LmT: Dwarf ----- --- Giant --- -----SuperGiant

O4 HD46223   O4 V
O5
O6 HD46150   O6 V


O7 15 Mon   O7 V
O8 HD46149   O8 V
O9 HD46202   O9 V
Iot Ori   O9 III
Pecular O-types

B0




Eps Ori   B0 Ia
B1 Ome1 Sco   B1 V

Bet CMa   B1 II-III

B2 22 Sco   B2 V
HR1891   B2.5 V
Gam Peg   B2 IV Pi4 Ori   B2 III

Chi2 Ori   B2 Ia
B3
B4
B5 HD36936   B5 V
Tau Ori   B5 III

Eta CMa   B5 Ia
B6
B7 Alp Leo   B7 V

B8




B9 HR749a   B9 V Alp Del   B9 IV



Pecular B-types

A0 (HR 3314)   A0 Va
(hd225047)   A0 Vb
(HR 7211)   A0 IV HR 3981   A0 III HR 6478   A0 II Eta Leo   A0 Ib
A1 HR 2324   A1 V Rho Peg   A1 IV
A2
Bet Crt   A2 IV

HR2996   A2 Ib
A3 Bet Leo   A3 V Bet Eri   A3 IV (HR 3514)   A3 III
A4
A5 HD23194   A5 V

Omi Sco   A5 II HR2874   A5 Ib
A6
A7 2 Hya   A7 V
HD23156   A7 V

The02 Tau   A7 III
A8
A9 HR 401   A9 V (n)
Gam Her   A9 III
Pecular A-types

F0 HD23585   F0 V 57 Tau   F0 IV Zet Leo   F0 III (HD 96898)   F0 II Alp Lep   F0 Ib
F1
F2 (HR 5487)   F2 V


Nu Aql   F2 Ib
F3 HR1279 (rec)   F3 V HR1566 (rec)   F3 IV
F4
F5 HD27524 (rec)   F5 V
PROCYON   F5 V-IV
HR2706 (rec)   F5 IV-III



F6 Gam Ser   F6 V
HR6577   F6 III-IV
F7
F8 HD27808   F8 V
HR8905 (rec)
HR8905 (nfx)   F8 III


Del CMa (rec)
Del CMa (nfx)   F8 Ia
F9 HR 506   F9 V
Pecular F-types

G0 Lam Ser (nfx)
Lam Ser (rec)   G0- V

81 Psc (nfx)
81 Psc (rec)   G0 III

Bet Aqr (nfx)
Bet Aqr (rec)   G0 Ib
G1
G2 HR3538 (nfx)
HR3538 (rec)   G2 V
Callisto (nor)
Callisto (rec)   G2 V

84 Her (nfx)
84 Her (rec)   G2 III

Alp Aqr   G2 Ib
G2.5


hr157 (rec)
hr157 (nfx)   G2.5 II
(high airmass)

G3

HR 4742 (rec)
HR 4742 (nfx)   G3 III

G4





G5 HR5209 (nfx)
HR5209 (rec)   G5 Va
Ome Sgr (nfx)
Ome Sgr (rec)   G5 IV


9 Peg   G5 Ib
G6
G7
G8 Tau Cet (nfx)
Tau Cet (rec)   G8 V
HR1008 (nfx)
HR1008 (rec)   G8 V

71 Oph (nfx)
71 Oph (rec)   G8 III

Eps Gem (nfx)
Eps Gem (rec)   G8 Ib
G9

Del Phe (nfx)
Del Phe (rec)   G9 III
Pecular G-types HD 207585 (nfx)
HD 207585 (rec)   G2 II Ba+1.5 CH+1 Fe-1
HR 6152 (nfx)
HR 6152 (rec)   G8.5 III CN-2 CH-1
HR 6757 (nfx)
HR 6757 (rec)   G9 III CH -3
HD 20394 (nor)
HD 20394 (rec)   G9 IIIa Ba+2.5

K0 hd224618 (rec)
hd224618 (nfx)   K0 V

19 Pup (rec)
19 Pup (nor)   K0 III
K0.5 Omi2 Eri (rec)
Omi2 Eri (nfx)   K0.5 V
K1 HR637 (nfx)
HR637 (rec)   K1 V
K2 Eps Eri (nfx)   K2 V
Bet Ret (nor)   K2 III
HR2102 (nfx)   K2 III
K3 HR 753 (nfx)   K3 V
hd 154430 (nor)   K3 V
K4 Gl 570A (nfx)   K4 V
Kap Pyx (nor)   K4 III
HR4991 (nor)   K4 III
K5 Gl 204 (nfx)   K5 V
N Vel (nor)   K5 III
K6 Gl 529 (nfx)   K6 Va
K7 GJ 185 (nor)   K7.0 VJ
Pecular K-types 42 Lib (nfx)   K3 III CN+2 HD 114960 (nfx)   K4 III CN+0.5

M0     
M0.5 Gl 846 (nor)   M0.5 V
M1.5 Gl 570b (nfx)   M1.5 V
Gl 205 (nfx)  M1.5 V
M2 Gl 526 (nfx)   M2 V
M2 GL 382 M2+ V
Chi Peg   M2 III


M2.5 Gl 752a (nor)   M2.5 V
M4 Omi02 EriC (nor)   M4.5 V e!!
M5
M6
M7
Pecular M-types