All names: Gaia DR3 1780738112877673856, TIC 279743833, Gaia DR2 1780738112877673856, 2MASS J21555390+2028030, SDSS J215553.90+202802.92, SDSS J215553.90+202802.9, Gaia EDR3 1780738112877673856, SDSS J215553.89+202802.8, SDSSJ215553.90+202802.9
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Geier 2020 | Genest-Beaulieu & Bergeron 2019 (spectroscopic) | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 21 55 53.91 (0.04) | 21 55 53.90 | 21 55 53.90 | 21 55 53.91 (0.05) | 21 55 53.90 (0.04) | |||||
| Declination | 20 28 02.92 (0.03) | 20 28 02.88 | 20 28 02.90 | 20 28 02.92 (0.05) | 20 28 02.84 (0.03) | |||||
| Spectral type | He-sdO | DB | sdOBA | |||||||
| Effective temperature | [K] | 47137.0 | 45000.0 (14) | |||||||
| log(g) | [cgs] | 6.77 | 6.50 (0.009) | |||||||
| Mass | [M☉] | 0.304 | 0.258 (0.001) | |||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | |||||||||
| log(H/He) | -2 | |||||||||
| log(C/He) | ||||||||||
| log(Ca/He) | ||||||||||
| log(Ca/H) | ||||||||||
| Parallax | [mas] | 0.35 (0.04) | 0.35 (0.06) | 0.35 (0.06) | 0.35 (0.04) | |||||
| Distance | [pc] | 2885.03 (358) | 2816.90 (440) | 2817.14 (440) | 2885.17 (358) | |||||
| Composition | ||||||||||
| Proper motion (right ascension) | [mas/yr] | 8.279566678 (0.04) | 8.392 (0.09) | 8.392166914 (0.09) | 8.28 (0.04) | |||||
| Proper motion (declination) | [mas/yr] | 5.29496716 (0.04) | 5.348 (0.09) | 5.347817196 (0.09) | 5.295 (0.04) | |||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | ||||||||||
| B magnitude | ||||||||||
| V magnitude | ||||||||||
| R magnitude | ||||||||||
| I magnitude | ||||||||||
| J magnitude | 16.29 (0.1) | 16.29 (0.1) | ||||||||
| H magnitude | 16.25 | |||||||||
| K magnitude | 15.64 | |||||||||
| u magnitude | 15.16 (0.005) | 15.16 (0.005) | 15.16 (0) | 15.16 (0.005) | ||||||
| g magnitude | 15.50 (0.004) | 15.50 (0.004) | 15.50 (0) | 15.50 (0.004) | ||||||
| r magnitude | 15.91 (0.005) | 15.91 (0.005) | 15.91 (0) | 15.91 (0.005) | ||||||
| i magnitude | 16.22 (0.005) | 16.22 (0.005) | 16.22 (0.01) | 16.22 (0.005) | ||||||
| z magnitude | 16.49 (0.009) | 16.49 (0.009) | 16.49 (0.01) | 16.49 (0.009) | ||||||
| G magnitude | 15.72 (0.003) | 15.73 (0.0009) | 15.73 | 15.72 (0.003) | ||||||
| BP magnitude | 15.60 (0.003) | 15.55 (0.008) | 15.55 | |||||||
| RP magnitude | 15.92 (0.003) | 15.93 (0.004) | 15.93 | |||||||
| Pan g magnitude | 15.58 (0.004) | 15.58 (0.004) | ||||||||
| Pan r magnitude | 15.93 (0.002) | 15.93 (0.002) | ||||||||
| Pan i magnitude | 16.25 (0.003) | 16.25 (0.003) | ||||||||
| Pan z magnitude | 16.50 (0.003) | 16.50 (0.003) | ||||||||
| Pan y magnitude | 16.69 (0.005) | 16.69 (0.005) | ||||||||
| E(B-V) | 0.057 | |||||||||
* 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.