All names: WISE J214254.41+080525.3, PM J21429+0805, NLTT 51908, LSPM J2142+0805, WDJ214254.49+080527.35, 21429+0805, Gaia DR2 2701893698904233216, HIDDEN NAME WD 2140+078, LP 578-24, USNO-B1.0 0980-00704611, WISEA J214254.42+080525.1, Gaia EDR3 2701893698904233216, SDSS J214254.44+080525.6, 2MASS J21425448+0805272, J2142+0805, Gaia DR3 2701893698904233216, TIC 418831175
| Parameter | Unit | Gaia EDR3 | O'Brien et al. 2024 | Caron et al. 2023 | Stilism | Holberg et al. 2016 | Limoges et al. 2015 | Vincent et al. 2024 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 21 42 54.40 (0.07) | 21 42 54.40 | 21 42 54.49 (0.07) | ||||||
| Declination | 08 05 24.23 (0.08) | 08 05 24.23 | 08 05 27.35 (0.08) | ||||||
| Spectral type | DA | DA | DA | DA | DC: | DA | |||
| Effective temperature | [K] | 4819.0 (48) | 4825.0 (13) | 4830.0 (515) | 4830.0 (515) | 4871.0 (26) | |||
| log(g) | [cgs] | 7.73 (0.04) | 7.71 (0.008) | 8.00 (0) | 8.00 (0) | 7.75 (0.01) | |||
| Mass | [M☉] | 0.443 (0.02) | 0.42 (0.006) | 0.58 (0) | 0.58 (0.1) | 0.436 (0.01) | |||
| log(Luminosity) | [L☉] | -4.11 | |||||||
| Cooling age | [Gyr] | 3.5800 | 6.4000 | ||||||
| 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] | 33.45 (0.09) | 33.45 (0.09) | 33.45 (0.09) | 33.45 | 33.45 (0.09) | |||
| Distance | [pc] | 29.90 (0.08) | 29.90 (0.08) | 29.90 (0.08) | 24.20 (3) | 25.10 (4) | 29.90 | 29.90 (0.08) | |
| Composition | H | H | H | ||||||
| Proper motion (right ascension) | [mas/yr] | -81.20925807 (0.08) | -81.209 (0.08) | ||||||
| Proper motion (declination) | [mas/yr] | -194.8002847 (0.09) | -194.8 (0.09) | ||||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 18.00 | ||||||||
| V magnitude | 15.66 | ||||||||
| R magnitude | 15.60 | ||||||||
| I magnitude | |||||||||
| J magnitude | 15.77 (0.03) | 15.77 | 15.77 (0.08) | ||||||
| H magnitude | 15.27 (0.03) | 15.27 | 15.27 (0.1) | ||||||
| K magnitude | 15.18 (0.03) | 15.18 | 15.18 (0.2) | ||||||
| u magnitude | 19.53 (0.03) | 19.53 (0.03) | |||||||
| g magnitude | 17.78 (0.006) | ||||||||
| r magnitude | 17.01 (0.005) | ||||||||
| i magnitude | 16.71 (0.005) | ||||||||
| z magnitude | 16.59 (0.009) | ||||||||
| G magnitude | 17.05 (0.01) | 17.05 | 17.05 (0.003) | ||||||
| BP magnitude | 17.57 (0.01) | ||||||||
| RP magnitude | 16.39 (0.006) | ||||||||
| Pan g magnitude | 17.67 (0.006) | ||||||||
| Pan r magnitude | 17.01 (0.003) | ||||||||
| Pan i magnitude | 16.75 (0.003) | ||||||||
| Pan z magnitude | 16.66 (0.005) | ||||||||
| Pan y magnitude | 16.60 (0.003) | ||||||||
| E(B-V) | 0.001 | ||||||||
* 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.