MOA-2010-BLG-477L

MOA-2010-BLG-477L
Observation data
Epoch J2000      Equinox J2000
Constellation Sagittiarus
Right ascension 18h 06m 7.44s[1]
Declination −31° 24′ 16.12″[1]
Characteristics
Evolutionary stage white dwarf[2]
Variable type unknown
Astrometry
Distance7500 ± 2000[3] ly
(2300 ± 600[3] pc)
Details
Mass0.53±0.11[2] M☉
Other designations
MOA 2010-BLG-477, MOA 2010-BLG-477L, MOA-2010-BLG-477 L
Database references
SIMBADThe star
planet b

MOA-2010-BLG-477L is a star whose existence was detected when it caused a microlensing event in August, 2010. The microlensing event also revealed the existence of a planet orbiting the star. At first the star was thought to be about 0.67 times the mass of the Sun,[1] in the main-sequence phase of its stellar evolution.[1][3] But by the time the star should have been separated enough in the sky from the source star of the microlensing event it was not detected, implying that it is actually a dim white dwarf star.[2]

  1. ^ a b c d Bachelet, E.; Shin, I.-G.; Han, C.; Fouqué, P.; Gould, A.; Menzies, J. W.; Beaulieu, J.-P.; Bennett, D. P.; et al. (2012). "MOA-2010-BLG-477Lb: Constraining the mass of a microlensing planet from microlensing parallax, orbital motion and detection of blended light". The Astrophysical Journal. 754 (1): 73. arXiv:1205.6323. Bibcode:2012ApJ...754...73B. doi:10.1088/0004-637X/754/1/73. S2CID 119223374.
  2. ^ a b c Blackman, J. W.; Beaulieu, J. P.; Bennett, D. P.; Danielski, C.; Alard, C.; Cole, A. A.; Vandorou, A.; Ranc, C.; Terry, S. K.; Bhattacharya, A.; Bond, I.; Bachelet, E.; Veras, D.; Koshimoto, N.; Batista, V.; Marquette, J. B. (2021), "A Jovian analogue orbiting a white dwarf star", Nature, 598 (7880): 272–275, arXiv:2110.07934, doi:10.1038/s41586-021-03869-6, PMID 34646001, S2CID 238860454
  3. ^ a b c Schneider, Jean (14 October 2021). "Planet MOA-2010-BLG-477L b.". Extrasolar Planets Encyclopaedia.