All names: Gaia DR2 930769616916994048, 2MASS J08300620+4751504, Gaia EDR3 930769616916994048, Gaia DR3 930769616916994048, USNO-B1.0 1378-00240181, GALEX J083006.1+475150, PG0826+480, SDSS J083006.17+475150.4, LAMOST J083006.16+475150.7, TIC 71163238, SDSS J083006.17+475150.2, SDSS J083006.17+475150.29, SDSS J083006.17+475150.3, UCAC4 690-049621, LAMOST J083006.17+475150.4, PG 0826+480
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 30 06.16 (0.04) | 08 30 06.17 | 08 30 06.17 | 08 30 06.18 | 08 30 06.16 (0.07) | 08 30 06.17 (0.04) | 08 30 06.17 | ||||
| Declination | 47 51 50.25 (0.03) | 47 51 50.37 | 47 51 50.37 | 47 51 50.73 | 47 51 50.26 (0.05) | 47 51 50.37 (0.03) | 47 51 50.43 | ||||
| Spectral type | sdB+WD | B/DAZ | sdB | SDB | |||||||
| Effective temperature | [K] | 25300.0 (600) | 28507.0 (161) | 27708.0 (76) | |||||||
| log(g) | [cgs] | 5.38 (0.06) | 5.60 (0.02) | 5.39 (0.02) | |||||||
| Mass | [M☉] | ||||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| Parallax | [mas] | 0.48 (0.05) | 0.34 (0.09) | 0.34 (0.09) | 0.48 (0.05) | ||||||
| Distance | [pc] | 2094.24 (236) | 2915.45 (768) | 2915.09 (768) | 2094.24 (236) | ||||||
| Composition | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -3.732094994 (0.05) | -4.015 (0.1) | -4.01542926 (0.1) | -3.732 (0.05) | 2.3 | |||||
| Proper motion (declination) | [mas/yr] | -7.061693401 (0.04) | -7.002 (0.09) | -7.00246427 (0.09) | -7.062 (0.04) | -6.6 | |||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | 16.10 | ||||||||||
| V magnitude | |||||||||||
| R magnitude | 16.28 | ||||||||||
| I magnitude | |||||||||||
| J magnitude | 16.74 (0.1) | 16.74 (0.1) | |||||||||
| H magnitude | 16.48 (0.2) | 16.48 (0.2) | |||||||||
| K magnitude | 16.85 | ||||||||||
| u magnitude | 15.70 (0.004) | 15.70 (0.004) | 15.70 (0.004) | 15.71 (0.01) | 15.70 (0.004) | 15.68 (0.02) | |||||
| g magnitude | 15.78 (0.003) | 15.78 (0.003) | 15.78 (0.003) | 15.81 (0.02) | 15.78 (0.003) | 15.77 (0.03) | |||||
| r magnitude | 16.25 (0.004) | 16.25 (0.004) | 16.25 (0.004) | 16.26 (0.01) | 16.25 (0.004) | 16.25 (0.009) | |||||
| i magnitude | 16.56 (0.004) | 16.56 (0.004) | 16.56 (0.004) | 16.58 (0.01) | 16.56 (0.004) | 16.57 (0.02) | |||||
| z magnitude | 16.88 (0.01) | 16.88 (0.01) | 16.88 (0.01) | 16.88 (0.03) | 16.88 (0.01) | 16.87 (0.03) | |||||
| G magnitude | 16.04 (0.004) | 16.06 (0.002) | 16.06 | 16.04 (0.003) | |||||||
| BP magnitude | 15.92 (0.004) | 15.88 (0.006) | 15.88 | ||||||||
| RP magnitude | 16.27 (0.004) | 16.27 (0.004) | 16.27 | ||||||||
| Pan g magnitude | 15.88 (0.004) | 15.88 (0.004) | |||||||||
| Pan r magnitude | 16.26 (0.003) | 16.26 (0.003) | |||||||||
| Pan i magnitude | 16.60 (0.003) | 16.60 (0.003) | |||||||||
| Pan z magnitude | 16.85 (0.006) | 16.84 (0.006) | |||||||||
| Pan y magnitude | 17.05 (0.03) | 17.05 (0.03) | |||||||||
| E(B-V) | 0.027 | ||||||||||
* 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.