05h30m27.52868s, +25° 19′ 57.0822″
| |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 05h30m 27.52856s[1] |
| Declination | +25° 19′ 57.0763″[1] |
| Characteristics | |
| Spectral type | A8Ve[2] |
| Astrometry | |
| Proper motion (μ) | RA: 3.685(33) mas/yr[1] Dec.: −26.373(22) mas/yr[1] |
| Parallax (π) | 6.4157 ± 0.0314 mas[1] |
| Distance | 508 ± 2 ly (155.9 ± 0.8 pc) |
| Other designations | |
MWC 758, BD+25 843, HIP 25793, 2MASS J05302753+2519571, IRAS 05273+2517 | |
| Database references | |
| SIMBAD | data |
HD 36112, also known as MWC 758, is a young Herbig Ae star located in the constellation Taurus, surrounded by irregular rings of cosmic dust. The system is about 3.5 million years old. The disk has a cavity at 50 astronomical units and two spiral arms at 30-75 au that are seen in near-infrared scattered light, but only one spiral arm is seen in ALMA images.[3][4]
The inner cavity was shown to be elliptical and not perfectly circular. This is not a projection effect but represents the shape of the cavity, with an eccentricity e ≈ 0.1 after the deprojection of the disk.[4]
A 2018 study detected a possible exoplanet at a distance of about 20 au, designated MWC 758 b,[5] and the observations with ALMA have also shown evidence of an unseen planet at 100 au.[4] A study in 2019 came to the conclusion that a 1.5 MJ planet at 35 au and a 5 MJ planet at 140 au could explain the features seen with ALMA and the VLA.[6]
In another 2019 study, a possible exoplanet or disk feature was detected with the Large Binocular Telescope, referred to as MWC 758 CC1 (Companion Candidate 1), with a non-detection of MWC 758 b.[7] However, another study in 2021 failed to detect either of the point sources found in earlier studies.[8] A 2023 study found further evidence for MWC 758 CC1, now designated MWC 758 c, orbiting at a distance of approximately 100 au.[9]
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