All names: LAMOST J080833.78+180221.8, Gaia EDR3 668963357040208512, GALEX J080833.7+180221, SDSS J080833.77+180221.8, Gaia DR3 668963357040208512, SDSSJ080833.76+180221.8, SDSS J080833.77+180221.84, Gaia DR2 668963357040208512, SDSS J080833.77+180221.5
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 08 33.78 (0.07) | 08 08 33.78 | 08 08 33.76 | 08 08 33.78 (0.09) | 08 08 33.77 (0.07) | ||||
| Declination | 18 02 21.35 (0.04) | 18 02 21.51 | 18 02 21.80 | 18 02 21.36 (0.05) | 18 02 21.56 (0.04) | ||||
| Spectral type | He-sdO | He-sdO | sdOHe | ||||||
| Effective temperature | [K] | 50000.0 (446) | |||||||
| log(g) | [cgs] | 7.00 (0.05) | |||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.14 (0.08) | 0.22 (0.1) | 0.22 (0.1) | 0.14 (0.08) | ||||
| Distance | [pc] | 7042.39 (3755) | 4614.67 (2264) | 4614.21 (2264) | 7042.25 (3754) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | 6.870975411 (0.08) | 6.887 (0.2) | 6.886945514 (0.2) | 6.871 (0.08) | ||||
| Proper motion (declination) | [mas/yr] | -12.83875576 (0.05) | -12.742 (0.1) | -12.74206538 (0.1) | -12.839 (0.05) | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | |||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | |||||||||
| H magnitude | |||||||||
| K magnitude | |||||||||
| u magnitude | 15.94 (0.005) | 15.94 (0.005) | 15.95 (0.02) | 15.94 (0.005) | |||||
| g magnitude | 16.33 (0.004) | 16.33 (0.004) | 16.39 (0.02) | 16.33 (0.004) | |||||
| r magnitude | 16.86 (0.005) | 16.86 (0.005) | 16.87 (0.02) | 16.86 (0.005) | |||||
| i magnitude | 17.19 (0.006) | 17.20 (0.006) | 17.21 (0.02) | 17.20 (0.006) | |||||
| z magnitude | 17.57 (0.01) | 17.57 (0.01) | 17.58 (0.02) | 17.52 (0.02) | |||||
| G magnitude | 16.60 (0.007) | 16.64 (0.002) | 16.64 | 16.60 (0.003) | |||||
| BP magnitude | 16.47 (0.007) | 16.34 (0.008) | 16.34 | ||||||
| RP magnitude | 16.97 (0.03) | 16.86 (0.005) | 16.86 | ||||||
| Pan g magnitude | 16.42 (0.006) | 16.42 (0.006) | |||||||
| Pan r magnitude | 16.85 (0.002) | 16.85 (0.002) | |||||||
| Pan i magnitude | 17.19 (0.004) | 17.19 (0.004) | |||||||
| Pan z magnitude | 17.47 (0.006) | 17.47 (0.006) | |||||||
| Pan y magnitude | 17.68 (0.02) | 17.68 (0.02) | |||||||
| E(B-V) | 0.031 | ||||||||
* 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.