All names: UCAC4 415-137143, GALEXJ20219-0700, UCAC2 29372345, Gaia EDR3 4216176365771393920, WISEA J202159.84-070058.0, WISE J202159.85-070058.0, 2MASS J20215982-0700580, GALEX J202159.8-070057, TIC 156588829, Gaia DR3 4216176365771393920, Gaia DR2 4216176365771393920
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 20 21 59.83 (0.04) | 20 21 59.84 | 20 21 59.83 (0.04) | ||
| Declination | -07 00 58.15 (0.03) | -07 00 57.40 | -07 00 57.94 (0.03) | ||
| Spectral type | sdOB | sdOB | |||
| Effective temperature | [K] | ||||
| log(g) | [cgs] | ||||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.80 (0.05) | 0.78 (0.06) | 0.80 (0.05) | |
| Distance | [pc] | 1244.09 (77) | 1277.14 (99) | 1244.09 (77) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -0.906 (0.05) | -1.077 (0.1) | -0.906 (0.05) | |
| Proper motion (declination) | [mas/yr] | -13.456 (0.04) | -13.486 (0.07) | -13.456 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 14.88 (0.07) | ||||
| V magnitude | 15.30 (0.2) | ||||
| R magnitude | 15.46 (0.09) | ||||
| I magnitude | |||||
| J magnitude | 15.57 (0.08) | 15.57 (0.08) | |||
| H magnitude | 16.07 (0.2) | 16.07 (0.2) | |||
| K magnitude | 16.05 | ||||
| u magnitude | |||||
| g magnitude | 14.87 (0.01) | ||||
| r magnitude | 15.37 (0.05) | ||||
| i magnitude | 15.83 (0.1) | ||||
| z magnitude | |||||
| G magnitude | 15.03 (0.003) | 15.04 (0.0007) | 15.03 (0.003) | ||
| BP magnitude | 14.89 (0.003) | 14.81 (0.007) | |||
| RP magnitude | 15.30 (0.004) | 15.30 (0.002) | |||
| Pan g magnitude | 14.87 (0.003) | ||||
| Pan r magnitude | 15.28 (0.004) | ||||
| Pan i magnitude | 15.63 (0.002) | ||||
| Pan z magnitude | 15.91 (0.003) | ||||
| Pan y magnitude | 16.09 (0.008) | ||||
| E(B-V) | 0.088 | ||||
* Constant surface field
Spectra without link are available upon request
The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.