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2MASS J15074769−1627386

2MASS 1507−1627 Credit: legacy surveys
Observation data Epoch J2000      Equinox J2000
Constellation	Libra
Right ascension	15 07 47.69
Declination	−16° 27′ 38.6″
Apparent magnitude (V)	22.136
Characteristics
Evolutionary stage	brown dwarf
Spectral type	L5
Apparent magnitude (R)	18.928±0.097
Apparent magnitude (J)	12.830 ± 0.027
Apparent magnitude (H)	11.895 ± 0.024
Apparent magnitude (K)	11.312 ± 0.026
Astrometry
Radial velocity (Rv)	-39.85 km/s
Proper motion (μ)	RA: -151.645 mas/yr Dec.: -895.714 mas/yr
Parallax (π)	134.9474 ± 0.2611 mas
Distance	24.17 ± 0.05 ly (7.41 ± 0.01 pc)
Details
Radius	0.08 R☉
Surface gravity (log g)	5.5 cgs
Temperature	1600 K
Other designations
2MASS J15074769-1627386, 2MASSW J1507476162738, 2MUCD 11296, 2MASSI J1507476−162738, Gaia DR2 6306068659857135232
Database references
SIMBAD	data

2MASS J15074769−1627386 (also abbreviated to 2MASS 1507−1627) is a brown dwarf in the constellation Libra, located about 23.9 light-years from Earth. It was discovered in 1999 by I. Neill Reid et al. It belongs to the spectral class L5; its surface temperature is 1,300 to 2,000 kelvins. As with other brown dwarfs of spectral type L, its spectrum is dominated by metal hydrides and alkali metals. Its spectrum also has a weak silicate absorption band and highly variable water absorption band, indicating complicated clouds and haze structures.

The brown dwarf is suspected to have a substellar companion (planet) on wide orbit with period over 10 years.

References

1. ^ "2MASSW J1507476-162738". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 16 October 2020.
2. Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
3. Stephens, D. C.; Leggett, S. K.; Cushing, Michael C.; Marley, Mark S.; Saumon, D.; Geballe, T. R.; Golimowski, David A.; Fan, Xiaohui; Noll, K. S. (2009), "The 0.8–14.5 μm Spectra of Mid-L to Mid-T Dwarfs: Diagnostics of Effective Temperature, Grain Sedimentation, Gas Transport, and Surface Gravity", The Astrophysical Journal, 702 (1): 154–170, arXiv:0906.2991, Bibcode:2009ApJ...702..154S, doi:10.1088/0004-637X/702/1/154, S2CID 118650774
4. Reid, I. Neill; Kirkpatrick, J. Davy; Gizis, J. E.; Dahn, C. C.; Monet, D. G.; Williams, Rik J.; Liebert, James; Burgasser, Adam J. (2000), "Four nearby L dwarfs", The Astronomical Journal, 119 (1): 369–377, arXiv:astro-ph/9909336, Bibcode:2000AJ....119..369R, doi:10.1086/301177, S2CID 12306473
5. Yang, Hao; Apai, Dániel; Marley, Mark S.; Saumon, Didier; Morley, Caroline V.; Buenzli, Esther; Artigau, Étienne; Radigan, Jacqueline; Metchev, Stanimir; Burgasser, Adam J.; Mohanty, Subhanjoy; Lowrance, Patrick J.; Showman, Adam P.; Karalidi, Theodora; Flateau, Davin; Heinze, Aren N. (2014), "HST Rotational Spectral Mapping of Two L-Type Brown Dwarfs: Variability in and Out of Water Bands Indicates High-Altitude Haze Layers", The Astrophysical Journal, 798: L13, arXiv:1411.2911, doi:10.1088/2041-8205/798/1/L13, S2CID 26179429
6. Prato, L.; Mace, G. N.; Rice, E. L.; McLean, I. S.; Kirkpatrick, J. Davy; Burgasser, Adam J.; Kim, Sungsoo S. (2015), "Radial velocity variability of field brown dwarfs", The Astrophysical Journal, 808 (1): 12, arXiv:1506.02771, Bibcode:2015ApJ...808...12P, doi:10.1088/0004-637X/808/1/12, S2CID 26692089

External links

• Entry at DwarfArchives.org Archived 2019-06-10 at the Wayback Machine

v t e Constellation of Libra
List of stars in Libra Libra in Chinese astronomy
Stars	Bayer α α (Zubenelgenubi) β (Zubeneschamali) γ (Zubenelhakrabi) δ (Zuben Elakribi) ε ζ ζ ζ ζ η θ ι ι κ λ μ ν ξ ξ ο σ (Brachium) τ υ Flamsteed 2 3 4 5 10 11 12 16 17 18 22 23 26 28 30 36 37 41 42 47 48 49 50 30 Ser Variable HO KU KX HR 5455 HD 133112 133131 134439 134440 139139 140283 141569 141937 Other 2M1510 2MASS 1507−1627 Gliese 555 HE 1523-0901 WASP-57 WISE 1541−2250
Exoplanets 23 Librae b c γ Librae b c Gliese 581b c e WASP-189b
Star clusters NGC 5897
Galaxies	NGC 5605 5728 5792 5793 5861 5885 5890 5898 5917 Other AP IC 1059 IRAS 14348-1447 PKS 1510-089
Category

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