All names: SDSS J082802.03+404008.8, SDSSJ082802.03+404008.9, Gaia DR2 914500864915422848, GALEX J082802.0+404008, LAMOST J082802.03+404008.8, USNO-B1.0 1306-00192989, Gaia EDR3 914500864915422848, SDSS J082802.03+404008.9, KUV 08247+4050, Gaia DR3 914500864915422848, SDSS J082802.03+404008.83, WD 0824+408
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | SDSS DR10 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 28 02.04 (0.1) | 08 28 02.04 | 08 28 02.04 | 08 28 02.03 | 08 28 02.04 (0.1) | 08 28 02.04 (0.1) | 08 28 02.04 | 08 28 01.97 | ||||
| Declination | 40 40 08.89 (0.07) | 40 40 08.96 | 40 40 08.96 | 40 40 08.90 | 40 40 08.89 (0.1) | 40 40 08.96 (0.07) | 40 40 08.93 | 40 40 02.64 | ||||
| Spectral type | sdO | sdO | sdO | SDO | DQ | |||||||
| Effective temperature | [K] | 43523.0 (1541) | 36285.0 (313) | |||||||||
| log(g) | [cgs] | 5.22 (0.2) | 5.01 (0.02) | |||||||||
| Mass | [M☉] | |||||||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | |||||||||||
| log(H/He) | ||||||||||||
| log(C/He) | ||||||||||||
| log(Ca/He) | ||||||||||||
| log(Ca/H) | ||||||||||||
| Parallax | [mas] | 0.17 (0.1) | 0.21 (0.2) | 0.21 (0.2) | 0.17 (0.1) | |||||||
| Distance | [pc] | 5949.13 (5011) | 4823.93 (4377) | 4823.12 (4376) | 5948.84 (5011) | |||||||
| Composition | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | 0.846219037 (0.2) | 1.006 (0.3) | 1.00611219 (0.3) | 0.846 (0.2) | -1.7 | ||||||
| Proper motion (declination) | [mas/yr] | -4.770110681 (0.1) | -4.875 (0.2) | -4.87455588 (0.2) | -4.77 (0.1) | -11.0 | ||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | 17.10 | |||||||||||
| V magnitude | 17.95 | |||||||||||
| R magnitude | 18.20 | |||||||||||
| I magnitude | ||||||||||||
| J magnitude | ||||||||||||
| H magnitude | ||||||||||||
| K magnitude | ||||||||||||
| u magnitude | 17.20 (0.008) | 17.20 (0.008) | 17.20 (0.008) | 17.19 (0.04) | 17.20 (0.008) | 17.17 (0.03) | ||||||
| g magnitude | 17.65 (0.005) | 17.65 (0.005) | 17.65 (0.005) | 17.66 (0.02) | 17.65 (0.005) | 17.67 (0.02) | ||||||
| r magnitude | 18.20 (0.007) | 18.20 (0.007) | 18.20 (0.007) | 18.21 (0.01) | 18.20 (0.007) | 18.21 (0.01) | ||||||
| i magnitude | 18.54 (0.01) | 18.54 (0.01) | 18.54 (0.01) | 18.55 (0.02) | 18.54 (0.01) | 18.59 (0.02) | ||||||
| z magnitude | 18.89 (0.04) | 18.89 (0.04) | 18.89 (0.04) | 18.90 (0.04) | 18.89 (0.04) | 18.90 (0.04) | ||||||
| G magnitude | 17.92 (0.01) | 17.95 (0.002) | 17.95 | 17.92 (0.003) | ||||||||
| BP magnitude | 17.73 (0.01) | 17.65 (0.02) | 17.65 | |||||||||
| RP magnitude | 18.31 (0.03) | 18.26 (0.02) | 18.26 | |||||||||
| Pan g magnitude | 17.73 (0.004) | 17.73 (0.004) | ||||||||||
| Pan r magnitude | 18.21 (0.003) | 18.21 (0.003) | ||||||||||
| Pan i magnitude | 18.60 (0.003) | 18.60 (0.003) | ||||||||||
| Pan z magnitude | 18.87 (0.02) | 18.87 (0.02) | ||||||||||
| Pan y magnitude | 19.02 (0.03) | 19.02 (0.03) | ||||||||||
| E(B-V) | 0.033 | |||||||||||
* 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.