 A combinedy band (near-infrared) and visual bandlight curve for V987 Tauri, adapted from Strassmeier and Rice (1998)[1] | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 04h 21m 58.8483s[2] |
| Declination | +28° 18′ 06.5119″[2] |
| Characteristics | |
| Evolutionary stage | pre-main-sequence star[3] |
| Spectral type | G5[4] |
| Apparent magnitude (B) | 9.80[2] |
| Apparent magnitude (g) | 8.80[5] |
| Apparent magnitude (R) | 9.14[2] |
| Apparent magnitude (J) | 7.414[2] |
| Variable type | T Tau[4] |
| Astrometry | |
| Radial velocity (Rv) | 15.0±1.5[4] km/s |
| Proper motion (μ) | RA: 8.84±0.03mas/yr[5] Dec.: -26.426±0.017mas/yr[5] |
| Parallax (π) | 7.8735±0.0190 mas[5] |
| Distance | 414.2 ± 1.0 ly (127.0 ± 0.3 pc) |
| Details[4] | |
| Mass | 1.6 M☉ |
| Radius | 2.2 R☉ |
| Luminosity | 5.5 L☉ |
| Temperature | 5770 K |
| Metallicity [Fe/H] | 0.7±0.2[3] dex |
| Rotation | 1.55d[3] |
| Rotational velocity (v sin i) | 78[3] km/s |
| Age | 9 Myr |
| Other designations | |
| HDE 283572,2MASS J04215884+2818066, BD+27 657, GSC 01828-00481, HIP 20388, TYC 1828-481-1, V987 Tauri, Gaia DR2 164536250037820160 | |
| Database references | |
| SIMBAD | data |
HD 283572 is a youngT Tauri-typepre-main sequence star in the constellation ofTaurus about414 light years away, belonging to theTaurus Molecular Cloud.[3] It is a rather evolvedprotostar which already dispersed itsbirth shroud.[4] The star emits a very highX-ray flux of 1031 ergs/s. That radiation flux associated with the magnetic activity induced a high coronal temperature of 3 kEv and regularflares.[6] HD 283572 will eventually evolve to anA-type main-sequence star when on themain sequence.[3] It is no longer accreting mass, and is magnetically decoupled from the remnants of theprotoplanetary disk,[3] belonging to the terminal, 3rd phase of the disk evolution.[7]Submillimeter Array (SMA) 1.3mm observations of HD 283572 detected an extreme brightening event with a radio luminosity of 8.3x1016erg/s/Hz that spanned 9 hours on January 17th 2022.[8][9]Although HD 283572 was observed by the SMA on 8 separate nights, millimeter emission was detected on one night only, strongly suggesting stellar variability as a result of an extreme stellar flare.[8][9]
HD 283572 is surrounded by a light (<0.0004M☉) and faint protoplanetary disk with uncertain inclination. Different instruments yielded measurements of disk inclination to the plane of sky from 35 to 60 degrees.[7] A search for planetary transits was performed but no planets were detected as of 2019.[10]
