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RIK-210 is a star located north of Scorpius. It is known for its mysterious dimming events.[4][2] 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.[3]
| Observation data Epoch J2000 Equinox | |
|---|---|
| Constellation | Scorpius |
| Right ascension | 16h 23m 24.544s[1] |
| Declination | −17° 17′ 27.14″[1] |
| 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[2] | |
| Mass | 0.53 ± 0.13 M☉ |
| Radius | 1.24 ± 0.125 R☉ |
| Temperature | 3500 K |
| Rotation | 5.5 d[3] |
| 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 | |
References
edit- ^ a b 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.
- ^ a b 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.
- ^ a b 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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