All names: NLTT 9320, USNO-B1.0 1111-00033100, 02557+2106S, SDSS J025545.73+210620.7, Gaia EDR3 109247788869176448, SDSS J025545.74+210620.7, PM J02557+2106S, Gaia DR2 109247788869176448, LSPM J0255+2106S, Gaia DR3 109247788869176448, TIC 91401130, WDJ025545.63+210621.61, J0255+2106, LP 411-22, WD 0252+209.1, 2MASS J02554558+2106219, PSO J043.9410+21.1054
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Caron et al. 2023 | Kilic et al. 2020 | Blouin et al. 2019 | MWDD H | Gaia DR2 | Stilism | Limoges et al. 2015 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 02 55 45.88 (0.08) | 02 55 45.87 (0.1) | 02 55 45.88 | 02 55 45.63 (0.08) | 02 55 45.87 | 02 55 45.43 | |||||||||
| Declination | 21 06 19.53 (0.07) | 21 06 19.59 (0.09) | 21 06 19.53 | 21 06 21.61 (0.07) | 21 06 19.59 | 21 06 18.00 | |||||||||
| Spectral type | DA | DA | DA | DA | DA | DA | DA | DA | DA | ||||||
| Effective temperature | [K] | 6284.0 (26) | 6252.0 (23) | 6283.0 (25) | 6145.0 (45) | 6175.0 | 6320.0 (105) | 6142.0 (61) | |||||||
| log(g) | [cgs] | 8.02 (0.008) | 8.01 (0.01) | 8.02 (0.01) | 7.97 (0.02) | 7.98 | 8.16 (0.1) | 7.96 (0.02) | |||||||
| Mass | [M☉] | 0.604 (0.008) | 0.593 (0.008) | 0.6 (0.009) | 0.571 (0.01) | 0.575 | 0.69 (0.1) | 0.567 (0.02) | |||||||
| log(Luminosity) | [L☉] | -3.72 | |||||||||||||
| Cooling age | [Gyr] | 2.1300 | 2.0000 (0.08) | 1.9960 | |||||||||||
| 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] | 20.09 (0.09) | 20.03 (0.1) | 20.03 (0.1) | 20.03 (0.1) | 20.09 | 20.09 (0.09) | 20.03 (0.1) | |||||||
| Distance | [pc] | 49.77 (0.2) | 49.93 (0.3) | 49.93 (0.3) | 49.93 (0.3) | 46.30 (1) | 49.77 | 49.77 (0.2) | 49.93 (0.3) | ||||||
| Composition | H | H | H | H | H | ||||||||||
| Proper motion (right ascension) | [mas/yr] | 220.5634551 (0.1) | 220.9663086 (0.2) | 220.563 (0.1) | 220.9663086 | ||||||||||
| Proper motion (declination) | [mas/yr] | -130.0813647 (0.1) | -130.0056923 (0.2) | -130.081 (0.1) | -130.0056923 | ||||||||||
| Variability | |||||||||||||||
| Magnetic | |||||||||||||||
| Bd | [MG] | ||||||||||||||
| Infrared excess (disk) | |||||||||||||||
| Binarity | |||||||||||||||
| B magnitude | 17.70 | ||||||||||||||
| V magnitude | |||||||||||||||
| R magnitude | 17.10 | ||||||||||||||
| I magnitude | |||||||||||||||
| J magnitude | 16.50 (0.02) | 16.48 (0.1) | 16.48 | 16.48 (0.1) | |||||||||||
| H magnitude | 16.04 (0.1) | 16.04 (0.1) | 16.04 | 16.04 (0.1) | |||||||||||
| K magnitude | 16.05 (0.3) | 16.05 (0.3) | 16.06 | 16.05 (0.3) | |||||||||||
| u magnitude | 18.42 (0.02) | 18.47 | 18.41 (0.02) | 18.47 (0.01) | |||||||||||
| g magnitude | 17.68 | 17.66 (0.006) | 17.67 (0.005) | ||||||||||||
| r magnitude | 17.36 | 17.37 (0.006) | 17.37 (0.005) | ||||||||||||
| i magnitude | 17.25 | 17.27 (0.004) | 17.25 (0.006) | ||||||||||||
| z magnitude | 17.20 | 17.26 (0.004) | 17.23 (0.01) | ||||||||||||
| G magnitude | 17.36 (0.01) | 17.38 | 17.36 | 17.36 (0.003) | 17.38 | ||||||||||
| BP magnitude | 17.65 (0.01) | 17.63 | 17.63 | ||||||||||||
| RP magnitude | 16.92 (0.009) | 16.91 | 16.91 | ||||||||||||
| Pan g magnitude | 17.66 (0.006) | 17.66 (0.006) | 17.66 (0.006) | ||||||||||||
| Pan r magnitude | 17.37 (0.007) | 17.37 (0.006) | 17.37 (0.006) | ||||||||||||
| Pan i magnitude | 17.27 (0.004) | 17.27 (0.004) | 17.27 (0.004) | ||||||||||||
| Pan z magnitude | 17.26 (0.004) | 17.26 (0.004) | 17.26 (0.004) | ||||||||||||
| Pan y magnitude | 17.27 (0.005) | 17.27 (0.005) | 17.27 (0.005) | ||||||||||||
| 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.