All names: Gaia DR3 581901582514764928, SDSS J084910.13+044528.7, Gaia DR2 581901582514764928, SDSS J084910.12+044528.7, EQ J0849+0445, J0849+0445, Gaia EDR3 581901582514764928, USNO-B1.0 0947-00165858, WD 0846+049
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | Gianninas et al. 2014 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 49 10.13 (0.2) | 08 49 10.13 | 08 49 10.13 (0.3) | 08 49 10.13 (0.2) | 08 49 10.13 | 08 49 09.96 | 08 49 10.13 | ||||
| Declination | 04 45 28.73 (0.1) | 04 45 28.71 | 04 45 28.73 (0.2) | 04 45 28.71 (0.1) | 04 45 28.71 | 04 45 25.92 | 04 45 28.71 | ||||
| Spectral type | DA | DA | DA | DA | DAH | ||||||
| Effective temperature | [K] | 10290.0 (150) | 9962.0 (165) | 9959.0 (155) | |||||||
| log(g) | [cgs] | 6.29 (0.05) | 5.93 (0.1) | 5.99 (0.2) | |||||||
| Mass | [M☉] | 0.178 | |||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | 1.6170 (0.1) | |||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| log(C/H) | |||||||||||
| log(N/H) | |||||||||||
| log(O/H) | |||||||||||
| log(Na/H) | |||||||||||
| log(Mg/H) | |||||||||||
| log(Al/H) | |||||||||||
| log(Si/H) | |||||||||||
| log(P/H) | |||||||||||
| log(S/H) | |||||||||||
| log(Sc/H) | |||||||||||
| log(Ti/H) | |||||||||||
| log(Cr/H) | |||||||||||
| log(Mn/H) | |||||||||||
| log(Fe/H) | |||||||||||
| log(Ni/H) | |||||||||||
| Parallax | [mas] | 0.56 (0.3) | 0.90 (0.4) | 0.56 (0.3) | |||||||
| Distance | [pc] | 1783.84 (950) | 1107.23 (532) | 1119.00 (156) | 1783.80 (949) | ||||||
| Composition | H | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -2.069314668 (0.3) | -1.335582067 (0.7) | -2.069 (0.3) | 2.5 | ||||||
| Proper motion (declination) | [mas/yr] | 1.150627135 (0.2) | 1.407548888 (0.4) | 1.151 (0.2) | -1.0 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | WDMS | ||||||||||
| B magnitude | 19.00 | ||||||||||
| V magnitude | |||||||||||
| R magnitude | 19.50 | ||||||||||
| I magnitude | |||||||||||
| J magnitude | |||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | 20.21 (0.04) | 20.21 (0.04) | 20.26 (0.04) | 20.25 | 20.24 (0.05) | ||||||
| g magnitude | 19.29 (0.01) | 19.29 (0.01) | 19.31 (0.02) | 19.30 | 19.29 (0.02) | ||||||
| r magnitude | 19.39 (0.01) | 19.39 (0.01) | 19.42 (0.02) | 19.41 | 19.40 (0.02) | ||||||
| i magnitude | 19.54 (0.02) | 19.54 (0.02) | 19.56 (0.02) | 19.55 | 19.54 (0.02) | ||||||
| z magnitude | 19.76 (0.07) | 19.77 (0.07) | 19.81 (0.08) | 19.81 | 19.80 (0.08) | ||||||
| G magnitude | 19.34 (0.03) | 19.38 | 19.34 (0.004) | ||||||||
| BP magnitude | 19.45 (0.03) | 19.39 | |||||||||
| RP magnitude | 19.31 (0.04) | 19.20 | |||||||||
| Pan g magnitude | 19.32 (0.01) | ||||||||||
| Pan r magnitude | 19.43 (0.01) | ||||||||||
| Pan i magnitude | 19.56 (0.01) | ||||||||||
| Pan z magnitude | 19.72 (0.02) | ||||||||||
| Pan y magnitude | 19.75 (0.09) | ||||||||||
| E(B-V) | 0.032 | ||||||||||
* 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.