OGLE-TR-122
Sign in to saveOGLE-TR-122 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 7.3 days. The system's primary is thought to resemble the Sun. ==OGLE-TR-122B== thumb|left|Brightness dip and velocity variations of OGLE-TR-122 The smaller star, OGLE-TR-122B, is estimated to have a radius around 0.12 solar radii, or around 20% larger than Jupiter's, and a mass of around 0.1 solar mas
Wikidata facts
- Radius
- 1.05
- Image
- 1e8m comparison Saturn Jupiter OGLE-TR-122b with Uranus Neptune Sirius B Earth Venus no transparency.png
Show 8 more facts
- Commons category
- OGLE-TR-122
- right ascension
- 166.71618872265380
- declination
- -60.86275036592250
- parallax
- 0.4657
- apparent magnitude
- 16.809
- catalog code
- V817 Car
- right ascension component of proper motion
- -5.275
- declination component of proper motion
- 0.828
Sources (3)
via Wikidata · CC0
~1 min read
Article
3 sectionsContents
- OGLE-TR-122B
- See also
- References
OGLE-TR-122 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 7.3 days. The system's primary is thought to resemble the Sun. ==OGLE-TR-122B== thumb|left|Brightness dip and velocity variations of OGLE-TR-122 The smaller star, OGLE-TR-122B, is estimated to have a radius around 0.12 solar radii, or around 20% larger than Jupiter's, and a mass of around 0.1 solar masses, or approximately 100 times Jupiter's. This makes its average density approximately 50 times the Sun's or over 80 times the density of water. OGLE-TR-122b's mass is close to the lowest possible mass for a hydrogen-fusing star, estimated to be around 0.07 or 0.08 solar masses. The observed transit provides the first direct evidence for a star with a radius comparable to Jupiter's.
==See also== OGLE-TR-123 EBLM J0555-57