All names: EC 04425-3027, Gaia DR3 4878256844442901888, NLTT 13882, Gaia DR2 4878256844442901888, HE 0442-3027, Gaia EDR3 4878256844442901888, WDJ044429.38-302140.19, 2MASS J04442939-3021401, LP 891-65, WD 0442-304, TIC 1168117, GALEX J044429.3-302141
| Parameter | Unit | Gaia EDR3 | Gaia DR2 | Stilism | Subasavage et al. 2007 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 04 44 29.28 (0.02) | 04 44 29.29 (0.03) | 04 44 29.38 | 04 44 29.28 | 04 44 29.38 (0.02) | 04 44 29.29 | 04 44 29.69 | ||
| Declination | -30 21 43.01 (0.02) | -30 21 42.92 (0.04) | -30 21 14.20 | -30 21 43.01 | -30 21 40.19 (0.03) | -30 21 42.92 | -30 21 31.68 | ||
| Spectral type | DQ | DC | DQ | DQ?DC? | |||||
| Effective temperature | [K] | 9949.0 (782) | 9928.0 (73) | ||||||
| log(g) | [cgs] | 8.09 (0.01) | |||||||
| Mass | [M☉] | 0.635 (0.01) | |||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| 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] | 19.95 (0.03) | 19.85 (0.04) | 19.95 | 19.95 (0.03) | 19.85 (0.04) | |||
| Distance | [pc] | 50.12 (0.08) | 50.38 (0.1) | 55.10 | 50.12 | 50.12 (0.08) | 50.38 (0.1) | ||
| Composition | He | ||||||||
| Proper motion (right ascension) | [mas/yr] | -77.66919207 (0.03) | -77.5860555 (0.07) | -77.669 (0.03) | -77.5860555 | ||||
| Proper motion (declination) | [mas/yr] | -176.1602964 (0.04) | -176.1755545 (0.1) | -176.16 (0.04) | -176.1755545 | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 16.07 | ||||||||
| V magnitude | 16.03 | ||||||||
| R magnitude | 15.93 | ||||||||
| I magnitude | 15.86 | ||||||||
| J magnitude | 15.94 (0.09) | 15.94 (0.09) | |||||||
| H magnitude | 15.81 | ||||||||
| K magnitude | 15.21 | ||||||||
| u magnitude | |||||||||
| g magnitude | |||||||||
| r magnitude | |||||||||
| i magnitude | |||||||||
| z magnitude | |||||||||
| G magnitude | 15.96 (0.002) | 15.99 | 15.96 | 15.96 (0.003) | 15.99 | ||||
| BP magnitude | 15.99 (0.002) | 15.97 | 15.97 | ||||||
| RP magnitude | 15.89 (0.004) | 15.89 | 15.89 | ||||||
| Pan g magnitude | |||||||||
| Pan r magnitude | |||||||||
| Pan i magnitude | |||||||||
| Pan z magnitude | |||||||||
| Pan y magnitude | |||||||||
| E(B-V) | 0.000 | ||||||||
* 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.