HD 221246

HD 221246 or NGC 7686 1

Observation data Epoch J2000      Equinox J2000
Constellation	Andromeda
Right ascension	23^h 30^m 07.41387^s[1]
Declination	+49° 07′ 59.3190″[1]
Apparent magnitude (V)	6.17[2]
Characteristics
Spectral type	K3III[3]
U−B color index	1.71[2]
B−V color index	1.46[2]
Astrometry
Radial velocity (Rv)	+6.0[4] km/s
Proper motion (μ)	RA: 28.94±0.32[1] mas/yr Dec.: 2.80±0.41[1] mas/yr
Parallax (π)	3.61 ± 0.50[1] mas
Distance	approx. 900 ly (approx. 280 pc)
Details
Radius	48[5] R☉
Other designations
BD+48° 4070, FK5 3882, HD 221246, HIP 115996, HR 8925, NGC 7686 1, SAO 53088.
Database references
SIMBAD	data

HD 221246 or NGC 7686 1 is a giant star in open cluster NGC 7686, and it belongs to the northern constellation of Andromeda.

References

1. van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357
2. Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory 4 (99), Bibcode:1966CoLPL...4...99J
3. Shenavrin, V. I.; et al. (2011). "Search for and study of hot circumstellar dust envelopes". Astronomy Reports 55 (1): 31–81. Bibcode:2011ARep...55...31S. doi:10.1134/S1063772911010070.
4. Wilson, R. E. (1953), General Catalogue of Stellar Radial Velocities, Carnegie Institute of Washington, D.C., Bibcode:1953GCRV..C......0W.
5. Pasinetti Fracassini, L. E.; et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy & Astrophysics 367: 521–24, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451

External links

• Image NGC 7686 1