| Object/type: | Caster / Multiple star |
| mag/dia/dist: | 1.58 / separation 3.1" / 52 ly |
| constellation: | Gemini |
| date/time/place: | Dec 14, 2000 / 24:00 / bangkok |
| trans'y/seeing/l-poll: | fair / fair / medium-high |
| telescope: | newtonian 4.5" f8.8 |
| eyepieces/power: | 6mm / 166x |
| sky atlas page: |
Caster A, mag1.99, consists of two stars nearly identical in size & luminosity ,each about twice the diameter of the Sun and 12 times its brightness
Caster B, mag2.85, consists of two stars, each star is about 1.5 times of the Sun diameter and 6 times the Sun luminosity.
Caster C, mag9.1-9.6, it is a spectroscopic double star, both of them are red dwarfs
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