All names: SDSS J004956.97+172752.9, Gaia DR3 2782037303315690752, WDJ004956.96+172753.07, SDSS J004956.97+172752.8, Gaia EDR3 2782037303315690752, J0049+1727, WDJ004956.96+172753.06, Gaia DR2 2782037303315690752
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Caron et al. 2023 | Kilic et al. 2020 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 00 49 56.99 (0.2) | 00 49 56.99 | 00 49 56.99 | 00 49 56.96 (0.2) | 00 49 56.99 | ||||||
| Declination | 17 27 52.75 (0.2) | 17 27 52.76 | 17 27 52.75 | 17 27 53.07 (0.2) | 17 27 52.76 | ||||||
| Spectral type | DC | DC | DC | DA: | DC | ||||||
| Effective temperature | [K] | 5789.0 (66) | 6049.0 (67) | 5790.0 (66) | 6371.0 (164) | ||||||
| log(g) | [cgs] | 8.01 (0.04) | 8.12 (0.05) | 7.96 (0.06) | 8.32 (0.05) | ||||||
| Mass | [M☉] | 0.575 (0.03) | 0.646 (0.05) | 0.548 (0.05) | 0.797 (0.05) | ||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | 3.3400 | |||||||||
| log(H/He) | -3.0 | -3 | |||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| log(N/He) | |||||||||||
| log(O/He) | |||||||||||
| log(Na/He) | |||||||||||
| log(Mg/He) | |||||||||||
| log(Al/He) | |||||||||||
| log(Si/He) | |||||||||||
| log(P/He) | |||||||||||
| log(S/He) | |||||||||||
| log(Cl/He) | |||||||||||
| log(Sc/He) | |||||||||||
| log(Ti/He) | |||||||||||
| log(V/He) | |||||||||||
| log(Cr/He) | |||||||||||
| log(Mn/He) | |||||||||||
| log(Fe/He) | |||||||||||
| log(Co/He) | |||||||||||
| log(Ni/He) | |||||||||||
| log(Cu/He) | |||||||||||
| log(Zn/He) | |||||||||||
| log(Ga/He) | |||||||||||
| log(Ge/He) | |||||||||||
| log(Sr/He) | |||||||||||
| Parallax | [mas] | 10.55 (0.3) | 10.26 (0.5) | 10.26 (0.5) | 10.55 | 10.55 (0.3) | 10.26 (0.5) | ||||
| Distance | [pc] | 94.77 (2) | 97.47 (4) | 97.43 (4) | 94.77 | 94.77 (2) | 97.43 (4) | ||||
| Composition | He | ||||||||||
| Proper motion (right ascension) | [mas/yr] | 30.78068252 (0.3) | 30.79610635 (0.8) | 30.781 (0.3) | 30.79610635 | ||||||
| Proper motion (declination) | [mas/yr] | -20.15123148 (0.2) | -20.17210497 (0.5) | -20.151 (0.2) | -20.17210497 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | 18.34 (0.06) | ||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | 20.21 (0.06) | 20.21 (0.06) | 20.21 (0.06) | ||||||||
| g magnitude | 19.45 (0.01) | 19.45 (0.01) | |||||||||
| r magnitude | 19.10 (0.01) | 19.10 (0.01) | |||||||||
| i magnitude | 19.07 (0.02) | 19.07 (0.02) | |||||||||
| z magnitude | 19.03 (0.06) | 19.03 (0.06) | |||||||||
| G magnitude | 19.14 (0.04) | 19.16 | 19.14 | 19.14 (0.004) | 19.16 | ||||||
| BP magnitude | 19.47 (0.04) | 19.35 | 19.35 | ||||||||
| RP magnitude | 18.74 (0.03) | 18.67 | 18.67 | ||||||||
| Pan g magnitude | 19.41 (0.01) | 19.41 (0.01) | |||||||||
| Pan r magnitude | 19.13 (0.006) | 19.13 (0.006) | |||||||||
| Pan i magnitude | 19.05 (0.006) | 19.05 (0.006) | |||||||||
| Pan z magnitude | 19.05 (0.02) | 19.05 (0.02) | |||||||||
| Pan y magnitude | 19.06 (0.02) | 19.06 (0.02) | |||||||||
| E(B-V) | 0.006 | ||||||||||
* 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.