| Object/type: | Albireo / double star |
| mag/dia/dist: | 3.09 / separation 34" / 385 ly |
| constellation: | Cygnus |
| date/time/place: | Jul 17, 01 / 01:00 / bangkok |
| trans'y/seeing/l-poll: | fair / fair / medium |
| telescope: | newtonian 4.5" f8.8 |
| eyepieces/power: | 25mm / 40x |
| sky atlas page: | 8 |
The big brighter star or "topaz", mag3.09, spectrum K3, luminosity 760 time of Sun (our Sun is G2V)
The smaller star or "sapphire", mag5.11, spectrum B8V, luminosity 120 time of Sun
The separation is 34.3", easily to split at low power. Home