 A light curve for KOI-81, adapted from van Kerkwijk et al. (2010).[1] The inset plot shows the eclipse on an expanded scale. | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 35m 08.577s[2] |
| Declination | +45° 01′ 06.58″[2] |
| Apparent magnitude (V) | 11.349[3] |
| Characteristics | |
| Spectral type | B9-A0V[1] |
| B−V color index | 0.204[3] |
| Details | |
| Mass | 2.71+0.19 −0.11[1] M☉ |
| Radius | 2.93 ± 0.14[1] R☉ |
| Luminosity | 77.3 ± 9.6[1] L☉ |
| Temperature | 10000[1] K |
| Other designations | |
KIC 8823868, 2MASS J19350857+4501065, GSC2.3 N2K9001230 | |
| Database references | |
| SIMBAD | data |
KOI-81 is an eclipsing binary star in the constellation of Cygnus. The primary star is a late B-type or early A-type main-sequence star with a temperature of 10,000 K (9,700 °C; 17,500 °F). It lies in the field of view of the Kepler Mission and was determined to have an object in orbit around it which is smaller and hotter than the main star.[4]
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