32. K2
The spectral type is determined from the ratios
4290:
4300 and
4226:
4325. Absolute-magnitude
differences are shown by the ratios
4063:
4077 and
4071:
4077, and the break in the
continuous spectrum at
4215.
Star | MKK | a | ![]() | m | HD | Note |
S 222 .... | K2 V | 00:43 | +04°46' | 5.8 | G5 | |
![]() | K2 V | 03:28 | -09 48 | 3.8 | K0 | |
![]() | K2 III | 10:44 | -15 40 | 3.3 | K0 | |
![]() | K2 III | 11:04 | +45 02 | 3.2 | K0 | |
![]() | K2 III | 11:40 | +48 20 | 3.9 | K0 | |
![]() | K2 III | 12:05 | -22 04 | 3.2 | K0 | |
a Boo .... | K2 pec | 14:11 | +19 42 | 0.2 | K0 | 1 |
![]() | K2 III | 15:22 | +59 19 | 3.5 | K0 | |
a Ser .... | K2 III-IV | 15:39 | +06 44 | 2.8 | K0 | |
![]() | K2 III | 16:52 | +09 32 | 3.4 | K0 | |
![]() | K2 III-IV | 17:38 | +04 37 | 2.9 | K0 | |
![]() | K2 III | 18:16 | +36 01 | 4.3 | K0 | |
109 Her .. | K2 III | 18:19 | +21 43 | 3.9 | K0 | |
![]() | K2 III | 18:55 | +14 56 | 4.2 | K0 | |
NOTE | ||||||
1. The spectral type is slightly earlier than the mean
for class K2.
The luminosity criteria are conflicting; from the intensity of
![]() ![]() ![]() |
The mean absolute magnitude of stars of class III is probably somewhat brighter than in types G5-K0.