All names: Gaia DR2 1730983351999762944, Gaia DR3 1730983351999762944, SDSS J205508.08+025204.9, UCAC4 465-128238, SDSS J205508.07+025204.9, PG 2052+027, SDSS J205508.08+025204.96, TIC 396294308, GALEX J205508.1+025204, Gaia EDR3 1730983351999762944, UCAC2 32795051, 2MASS J20550809+0252050, PG2052+027
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 20 55 08.08 (0.05) | 20 55 08.08 | 20 55 08.08 | 20 55 08.08 (0.06) | 20 55 08.08 (0.05) | ||||
| Declination | 02 52 04.83 (0.03) | 02 52 04.96 | 02 52 05.60 | 02 52 04.84 (0.05) | 02 52 05.02 (0.03) | ||||
| Spectral type | sdOB | He-sdO | sdOHe | ||||||
| Effective temperature | [K] | 49256.0 (120) | |||||||
| log(g) | [cgs] | 6.82 (0.009) | |||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.24 (0.06) | 0.29 (0.08) | 0.29 (0.08) | 0.24 (0.06) | ||||
| Distance | [pc] | 4164.21 (1038) | 3481.89 (912) | 3482.07 (911) | 4164.93 (1039) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | 0.759642555 (0.06) | 1.102 (0.1) | 1.101572766 (0.1) | 0.76 (0.06) | ||||
| Proper motion (declination) | [mas/yr] | -11.98566377 (0.05) | -11.914 (0.1) | -11.91394938 (0.1) | -11.986 (0.05) | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 16.01 (0.03) | ||||||||
| V magnitude | 16.45 (0.01) | ||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | 16.63 (0.1) | 16.63 (0.1) | |||||||
| H magnitude | 16.40 | ||||||||
| K magnitude | 17.15 | ||||||||
| u magnitude | 15.60 (0.005) | 15.60 (0.005) | 15.60 (0) | 15.60 (0.005) | |||||
| g magnitude | 15.90 (0.003) | 15.90 (0.003) | 15.90 (0) | 15.90 (0.003) | |||||
| r magnitude | 16.32 (0.004) | 16.32 (0.004) | 16.32 (0) | 16.32 (0.004) | |||||
| i magnitude | 16.65 (0.005) | 16.65 (0.005) | 16.65 (0) | 16.65 (0.005) | |||||
| z magnitude | 16.91 (0.01) | 16.91 (0.01) | 16.91 (0.01) | 16.91 (0.01) | |||||
| G magnitude | 16.12 (0.003) | 16.15 (0.002) | 16.15 | 16.12 (0.003) | |||||
| BP magnitude | 16.00 (0.003) | 15.93 (0.008) | 15.93 | ||||||
| RP magnitude | 16.33 (0.007) | 16.33 (0.01) | 16.33 | ||||||
| Pan g magnitude | 15.99 (0.003) | 15.99 (0.003) | |||||||
| Pan r magnitude | 16.36 (0.003) | 16.36 (0.003) | |||||||
| Pan i magnitude | 16.68 (0.004) | 16.68 (0.004) | |||||||
| Pan z magnitude | 16.93 (0.006) | 16.93 (0.006) | |||||||
| Pan y magnitude | 17.11 (0.007) | 17.11 (0.007) | |||||||
| E(B-V) | 0.059 | ||||||||
* 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.