EPIC 204278916
Observation data ICRS )
| |
---|---|
Constellation | Scorpius |
Right ascension | 16h 02m 07.576s[1] |
Declination | −22° 57′ 46.89″[1] |
Characteristics | |
Evolutionary stage | Pre-main-sequence |
Spectral type | M1[2] |
Apparent magnitude (R) | 13.7[3] |
J−H color index | 0.712 |
J−K color index | 1.033 |
Details | |
Myr | |
USNO -B1.0 0670-00406583, Gaia DR2 6243130106031671168 | |
Database references | |
SIMBAD | data |
EPIC 204278916 is a pre-main-sequence star, about five million years old with a spectral type of M1, implying a red dwarf. It is part of the Upper Scorpius sub-group of the Scorpius–Centaurus association, and is in the constellation Scorpius. The star is approximately the size of the Sun at 0.97 R☉, but is only half its mass (0.50 M☉) and a fraction of its luminosity (0.15 L☉).[5]
This stellar object was first characterized by the 2nd
Luminosity
In August 2016, a team of astronomers, led by Simone Scaringi of the Max Planck Institute for Extraterrestrial Physics in Germany, reported that this red dwarf star has a resolved circumstellar disc. Further, the research team observed unusual luminosity dimmings of up to 65% for 25 consecutive days (out of 79 total observation days). The variability in luminosity was highly periodic and attributed to stellar rotation. The researchers hypothesized that the irregular dimmings were caused by either a warped inner-disk edge or transiting cometary-like objects in either circular or eccentric orbits.[5]
See also
References
- ^ Bibcode:2003yCat.1289....0Z.
- S2CID 14150392.
- ^ doi:10.1086/341174.
- .
- ^ S2CID 8188464.
- Bibcode:2003yCat.2246....0C.