13 Boötis
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Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Boötes |
Right ascension | 14h 08m 17.303s[1] |
Declination | +49° 27′ 29.40″[1] |
Apparent magnitude (V) | 5.274 |
Characteristics | |
Spectral type | M1.5III |
U−B color index | 1.65 |
B−V color index | 1.92 |
R−I color index | 1.12 |
Variable type | Lb[2] |
Astrometry | |
Radial velocity (Rv) | -13.4 km/s |
Proper motion (μ) | RA: -59.57 ± 0.26[1] mas/yr Dec.: 60.42 ± 0.23[1] mas/yr |
Parallax (π) | 5.94 ± 0.25 mas[1] |
Distance | 550 ± 20 ly (168 ± 7 pc) |
Absolute magnitude (MV) | 6.944 |
Details | |
Mass | 0.8-2.6 [3] M☉ |
Radius | 71 R☉ |
Luminosity | ≈680 L☉ |
Temperature | ≈3,500 K |
Orbit | |
Companion | CCDM 14082+4927 B H112 |
Semi-major axis (a) | 79.7″ |
Inclination (i) | 274° |
Other designations | |
Database references | |
SIMBAD | data |
Data sources: | |
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
13 Boötis or CF Boötis is a variable star in the constellation Boötes. It is approximately 550 light years from Earth.[1] That means if you traveled at the speed of light, it would take 550 years to arrive at 13 Boötis.
13 Boötis is a M-type red giant with a mean apparent magnitude of +5.26. It is classified as an irregular variable star and its brightness varies from magnitude +5.2 to +5.3.
13 Boötis (H VI 112) RA: 14h 08m Dec: +49° 27′ Magnitudes: 5.5, 11.0 Separation[clarification needed]: 75.5″ Position Angle: 271° (WDS 2005) Distance: 557 Light Years
If you draw a line from Lambda (λ) Boötis to Kappa (κ) Boötis, you’ll find 13 Boötis lying at the midway point and about an arcminute west of it
A planetary system?
Back in 1991 Duquennoy & Mayor [4] reported the possible presence of a low-mass object (of likely substellar nature) orbiting the red giant 13 Bootis. They set a minimum mass of 30 times that of Jupiter (likely a brown dwarf) and estimated an orbital period of 1.35 years. So far there has been no confirmation about the presence a substellar object.
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b (unconfirmed) | ≥30 MJ | ≥1.25 | 494 | 0.21 | — | — |
Components
NAME | Right ascension | Declination | Apparent magnitude (V) | Spectral type | Database references |
---|---|---|---|---|---|
BDS 6736 B (BD+50 2047B) | 14h 08m 09.4212s | +49° 27' 30.665 | 10.9 | Simbad |
References
- ^ a b c d e f 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. Vizier catalog entry
- ^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
- ^ Alvarez; Menessier (1997). "Determination of Miras temperatures from TiO and VO bands. Estimates of distances". Astronomy and Astrophysics. 317: 761–768. Bibcode:1997A&A...317..761A.
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