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 | |
 Eri .... | K2 V | 03:28 | -09 48 | 3.8 | K0 | |
 Hya .... | K2 III | 10:44 | -15 40 | 3.3 | K0 | |
 UMa ... | K2 III | 11:04 | +45 02 | 3.2 | K0 | |
 UMa ... | K2 III | 11:40 | +48 20 | 3.9 | K0 | |
| Crv .... | K2 III | 12:05 | -22 04 | 3.2 | K0 | |
| a Boo .... | K2 pec | 14:11 | +19 42 | 0.2 | K0 | 1 |
 Dra .... | K2 III | 15:22 | +59 19 | 3.5 | K0 | |
| a Ser .... | K2 III-IV | 15:39 | +06 44 | 2.8 | K0 | |
 Oph .... | K2 III | 16:52 | +09 32 | 3.4 | K0 | |
 Oph
.... | K2 III-IV | 17:38 | +04 37 | 2.9 | K0 | |
| Lyr .... | K2 III | 18:16 | +36 01 | 4.3 | K0 | |
| 109 Her .. | K2 III | 18:19 | +21 43 | 3.9 | K0 | |
| Aql .... | 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
4077
relative to neighboring Fe lines a luminosity class of III or even
slightly brighter would be obtained, while the CN break at
4215 is
considerably weaker than in other stars of class III. a Bootis is a
high-velocity giant and the spectral peculiarities observed are
similar to those in the case of the high-velocity giants
Lep and
Boss 2527.
| ||||||
The mean absolute magnitude of stars of class III is probably somewhat brighter than in types G5-K0.