OGLE-TR-123 - Misplaced Pages

Star in the constellation Carina

OGLE-TR-123
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Carina
Right ascension	11 06 51.19
Declination	−61° 11′ 10.1″
Characteristics
Spectral type	F (primary)/M (b)
Apparent magnitude (I)	15.40 (system)
Variable type	Eclipsing binary
Astrometry

Distance	5000 ± 1000 ly (1600 ± 400 pc)

Orbit
Period (P)	1.804 days
Semi-major axis (a)	0.031 ± 0.002 AU
Eccentricity (e)	0
Inclination (i)	86–90°°
Details
OGLE-TR-123A
Mass	1.3 `M`_☉
Radius	1.55 `R`_☉
Temperature	6700 ± 300 K
OGLE-TR-123b
Mass	0.085 `M`_☉
Radius	0.13 `R`_☉
Other designations
V816 Car, 2MASS J11065112-6111103
Database references
SIMBAD	data

OGLE-TR-123 is a binary stellar system containing one of the smallest main-sequence stars whose radius has been measured. It was discovered when the Optical Gravitational Lensing Experiment (OGLE) survey observed the smaller star eclipsing the larger primary. The orbital period is approximately 1.80 days.

OGLE-TR-123B

The smaller star, OGLE-TR-123B, is estimated to have a radius around 0.13 solar radii, and a mass of around 0.085 solar masses (M_☉), or approximately 90 times Jupiter's. OGLE-TR-123b's mass is close to the lowest possible mass, estimated to be around 0.07 or 0.08 M_☉, for a hydrogen-fusing star.

References

^ The Optical Gravitational Lensing Experiment. Additional Planetary and Low-Luminosity Object Transits from the OGLE 2001 and 2002 Observational Campaigns, A. Udalski, G. Pietrzynski, M. Szymanski, M. Kubiak, K. Zebrun, I. Soszynski, O. Szewczyk, and L. Wyrzykowski, Acta Astronomica 53 (June 2003), pp. 133–149.
^ Radius and mass of a transiting M dwarf near the hydrogen-burning limit. OGLE-TR-123, F. Pont, C. Moutou, F. Bouchy, R. Behrend, M. Mayor, S. Udry, D. Queloz, N. Santos, and C. Melo, Astronomy and Astrophysics 447, #3 (March 1, 2006), pp. 1035–1039. doi:10.1051/0004-6361:20053692. Bibcode:2006A&A...447.1035P.
Theory of Low-Mass Stars and Substellar Objects, Gilles Chabrier and Isabelle Baraffe, Annual Review of Astronomy and Astrophysics 38 (2000), pp. 337–377.

Constellation of Carina

Stars

Bayer	α (Canopus) β (Miaplacidus) ε (Avior) η θ ι (Aspidiske) υ χ ω
Variable	R S T (not variable) U Y RT AG BO CK EV GG HR IX OY PP (p) QZ V337 (q) V341 V343 (d) V344 (f) V345 (E) V357 (a) V371 (z) V372 V376 (b) V382 (x) V399 (P) V415 (A) V448 (O) V518 V520 (w) V528 V533 (y) V560 V602 V640 V742 V752 V759 V816 V817 V906
HR	2435 (N) 2934 (Q) 3159 (D) 3220 (B) 3260 (C) 3414 (e) 3415 (e) 3571 (c) 3598 (b) 3643 (G) 3663 (i) 3696 (g) 3728 (k) 3821 (H) 3825 (h) 3856 (m) 3884 (l) 4025 (M) 4089 (L) 4102 (I) 4114 (s) 4138 (K) 4142 4159 (r) 4164 (t) 4177 (t) 4205 4222 4257 (u) 4325 (z)
HD	53143 63765 (Tapecue) 65216 85628 92206 93129 93250 93403 95086 97950
Other	AWI0005x3s CPD−57°2874 DEN 0817−6155 1E 1048-59 Innes' star LHS 288 NGC 3603-A1 NGC 3603-B NGC 3603-C OGLE-TR-182 OGLE-TR-211 OGLE2-TR-L9 Sher 25 WR 20a WR 21a WR 24 WR 25 WR 30a WR 31a WR 42e

Exoplanets	OGLE-TR-111b OGLE-TR-132b OGLE-TR-113b OGLE-TR-182b OGLE-TR-211b OGLE2-TR-L9b HD 63765 b (Yvaga) HD 65216 b HD 65216 c HD 85628 Ab HD 95086 b (Levantes) Gliese 422 b

Star
clusters

NGC	2516 2808 3114 3293 3324 3532 3603
Other	Carina OB1 Carina OB2 Collinder 228 IC 2602 IC 2714 Platais 8 Trumpler 14 Trumpler 15 Trumpler 16 Westerlund 2

Nebulae

NGC	2867 3199 3576 3579 3581 3582 3584 3586
Other	Carina Nebula Finger of God Globule G290.1-0.8 Hen 2-47 Homunculus Nebula IC 2220 IC 2448 IGR J11014−6103 RCW 49

Galaxies

NGC	3059
Other	Carina Dwarf Spheroidal Galaxy

Galaxy clusters	Bullet Cluster

Astronomical events	GRB 000131 GRB 080916C

OGLE-TR-123B

See also

References