39 Boötis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14h 49m 41.29265s[1] |
| Declination | +48° 43′ 14.9077″[1] |
| Apparent magnitude (V) | 5.69[2] |
| Characteristics | |
| Spectral type | F8V+F7V[3] |
| B−V color index | +0.475[2] |
| Astrometry | |
| Radial velocity (Rv) | −30.90 ± 0.3[4] km/s |
| Proper motion (μ) | RA: −77.94[1] mas/yr Dec.: 100.83[1] mas/yr |
| Parallax (π) | 14.58 ± 0.51[1] mas |
| Distance | 224 ± 8 ly (69 ± 2 pc) |
| Absolute magnitude (MV) | 2.53[5] |
| Details | |
| Mass | 1.43[5] M☉ |
| Rotational velocity (v sin i) | 161.0[5] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
39 Boötis (abbreviated as 39 Boo) or ADS 9406 B is a star in the constellation Boötes. A multiple star system, it has a combined apparent magnitude of 5.68. The system is 224 ± 8 light-years distant. [1] It is composed of BD+49 2326A, which has an apparent magnitude of 6.248 and spectral type F8V, and BD+49 2326B, which has an apparent magnitude of 6.62 and spectral type F7V. Both stars are themselves spectroscopic binaries.[3]
References
- 1 2 3 4 5 6 van Leeuwen, F. (2007). "Validation of the New Hipparcos Reduction". Astronomy and Astrophysics. 474 (2): 653–64. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
- 1 2 Haggkvist, L.; Oja, T. "Results of BV photometry 1969-70 (Uppsala refractor)". Private Communication. SIMBAD. Bibcode:1970Priv.........0H.
- 1 2 Abt, Helmut A. (2009). "MK Classifications of Spectroscopic Binaries". The Astrophysical Journal Supplement. 180 (1): 117–18. Bibcode:2009ApJS..180..117A. doi:10.1088/0067-0049/180/1/117.
- ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
- 1 2 3 Pizzolato, N.; Maggio, A.; Sciortino, S. (September 2000), "Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases", Astronomy and Astrophysics, 361: 614–628, Bibcode:2000A&A...361..614P
Components
| NAME | Right ascension | Declination | Apparent magnitude (V) | Spectral type | Database references |
|---|---|---|---|---|---|
| ADS 9406 A (BD+49 2326A) | 14h 49m 41.5s | +48° 43' 09 | 6.2 | F5 | Simbad |
| ADS 9406 C (CCDM J14497+4843B) | 14h 49m 41.8s | +48° 43' 11 | 6.7 | F5 | Simbad |
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