WISPIT 2
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.jpg) The disk around WISPIT 2 with VLT SPHERE. The protoplanet WISPIT 2b is inside the gap of the disk on the lower right while zoomed in, another protoplanet WISPIT 2c is inside of the inner disk Credit: ESO/R. F. van Capelleveen et al. | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 23m 17.03s[1] |
| Declination | −07° 40′ 55.1″[1] |
| Apparent magnitude (V) | 11.60±0.12[2] |
| Characteristics | |
| Evolutionary stage | pre-main-sequence[3] |
| Variable type | T Tau[3] |
| Astrometry | |
| Radial velocity (Rv) | −16.23±14.58[4] km/s |
| Proper motion (μ) | RA: 6.308±0.024[1] mas/yr Dec.: −27.138±0.018[1] mas/yr |
| Parallax (π) | 7.4649±0.0214 mas[1] |
| Distance | 437 ± 1 ly (134.0 ± 0.4 pc) |
| Details[4] | |
| Mass | 1.08+0.06 −0.17 M☉ |
| Radius | 1.418±0.004 R☉ |
| Luminosity (bolometric) | 0.699±0.021 L☉ |
| Surface gravity (log g) | 4.00±0.25 cgs |
| Temperature | 4400±50 K |
| Rotation | 4.7004 days |
| Age | 5.1+2.4 −1.3 Myr |
| Other designations | |
| TYC 5709-354-1, IRAS 19205-0746, IRAS F19205-0746, Gaia DR2 4207586980945067648 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
WISPIT 2 (also called TYC 5709-354-1) is a pre-main-sequence star in the constellation Aquila. It is part of the Scorpius-Centaurus OB association, likely belonging to the subgroup Theia 53. The star has a directly imaged circumstellar disk with multiple rings and one directly imaged protoplanet inside one of the gaps.[4] This protoplanet was also detected in H-alpha, showing it is surrounded by a circumplanetary disk.[5] The star is named after the astronomical survey Wide Separation Planets In Time (WISPIT) in the course of which the protoplanetary system was discovered.
The disk was classified as transitional, meaning it has an inner cavity.[5] The disk has 4 rings and one prominent gap at 68 astronomical units (AU). The outermost ring is located at 316 AU and the disk was detected out to a distance of 2.8 arcseconds (380 AU) from the star. The inclination of the disk is around 44° to 46°.[4]
