RIK-210

RIK-210
Observation data; Epoch J2000 Equinox ICRS
Constellation	Ophiuchus
Right ascension	16h 23m 24.544s
Declination	−17° 17′ 27.14″
Characteristics
Evolutionary stage	pre-main sequence star
Spectral type	M2.5
Apparent magnitude (Kp)	13.7
Apparent magnitude (B)	16.213 ± 0.066
Apparent magnitude (V)	14.630 ± 0.137
Apparent magnitude (J)	10.61 ± 0.02
Apparent magnitude (H)	9.85 ± 0.02
Apparent magnitude (K)	9.65 ± 0.02
B−V color index	1.583 ± 0.203
V−R color index	0.537 ± 0.255
R−I color index	1.231 ± 0.217
J−H color index	0.76 ± 0.04
J−K color index	0.96 ± 0.04
Variable type	EW
Astrometry
Distance	145 ± 20 pc
Details
Mass	0.53 ± 0.13 M☉
Radius	1.24 ± 0.125 R☉
Temperature	3500 K
Rotation	5.5 d
Rotational velocity (v sin i)	11 ± 1 km/s−1 km/s
Age	7.5 ± 2.5 Myr
Other designations
	2MASS J16232454-1717270, EPIC 205483258
Database references
SIMBAD	data
Exoplanet Archive	data
Data sources:
arXiv:1612.03907 [astro-ph.SR],; SIMBAD,; NStED

RIK-210 is a star located in the constellation Ophiuchus. It is known for its mysterious dimming events. The dips are observed with stable period of 5.667 days, but their triangular shape is inconsistent with the planetary eclipses. Instead, the diffuse cloud on synchronous orbit may be responsible.

References

↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
1 2 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
1 2 David, Trevor J.; Petigura, Erik A.; Hillenbrand, Lynne A.; Cody, Ann Marie; Cameron, Andrew Collier; Stauffer, John R.; Fulton, B. J.; Isaacson, Howard T.; Howard, Andrew W.; Howell, Steve B.; Everett, Mark E.; Wang, Ji; Benneke, Björn; Hellier, Coel; West, Richard G.; Pollacco, Don; Anderson, David R. (27 January 2017). "A Transient Transit Signature Associated with the Young Star RIK-210". The Astrophysical Journal. 835 (2): 168. arXiv:1612.03907. Bibcode:2017ApJ...835..168D. doi:10.3847/1538-4357/835/2/168. S2CID 2323788.
1 2 Stauffer, John; Cameron, Andrew Collier; Jardine, Moira; David, Trevor J.; Rebull, Luisa; Cody, Ann Marie; Hillenbrand, Lynne A.; Barrado, David; Wolk, Scott; Davenport, James; Pinsonneault, Marc (2017), "Orbiting Clouds of Material at the Keplerian Co-rotation Radius of Rapidly Rotating Low-mass WTTS in Upper Sco", The Astronomical Journal, 153 (4): 152, arXiv:1702.01797, Bibcode:2017AJ....153..152S, doi:10.3847/1538-3881/aa5eb9, S2CID 35276346
↑ Nowakowski, Tomasz (16 December 2016). "Astronomers observe mysterious dimming of a young nearby star". Phys.org. Retrieved 5 August 2017.

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[1] Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.

[DR2-2] 1 2 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.

[david2017-3] 1 2 David, Trevor J.; Petigura, Erik A.; Hillenbrand, Lynne A.; Cody, Ann Marie; Cameron, Andrew Collier; Stauffer, John R.; Fulton, B. J.; Isaacson, Howard T.; Howard, Andrew W.; Howell, Steve B.; Everett, Mark E.; Wang, Ji; Benneke, Björn; Hellier, Coel; West, Richard G.; Pollacco, Don; Anderson, David R. (27 January 2017). "A Transient Transit Signature Associated with the Young Star RIK-210". The Astrophysical Journal. 835 (2): 168. arXiv:1612.03907. Bibcode:2017ApJ...835..168D. doi:10.3847/1538-4357/835/2/168. S2CID 2323788.

[Stauffer2017-4] 1 2 Stauffer, John; Cameron, Andrew Collier; Jardine, Moira; David, Trevor J.; Rebull, Luisa; Cody, Ann Marie; Hillenbrand, Lynne A.; Barrado, David; Wolk, Scott; Davenport, James; Pinsonneault, Marc (2017), "Orbiting Clouds of Material at the Keplerian Co-rotation Radius of Rapidly Rotating Low-mass WTTS in Upper Sco", The Astronomical Journal, 153 (4): 152, arXiv:1702.01797, Bibcode:2017AJ....153..152S, doi:10.3847/1538-3881/aa5eb9, S2CID 35276346

[5] Nowakowski, Tomasz (16 December 2016). "Astronomers observe mysterious dimming of a young nearby star". Phys.org. Retrieved 5 August 2017.