All names: USNO-B1.0 1143-00231944, WD 1545+244, Gaia EDR3 1219657707181797632, Gaia DR3 1219657707181797632, 2MASS J15475449+2420397, GALEX J154754.5+242039, Ton 249, SDSS J154754.49+242040.1, PG 1545+245, UCAC4 572-053559, Ton249, Gaia DR2 1219657707181797632, WDJ154754.51+242039.89, TIC 283922021
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Gaia DR2 | Stilism | Bergeron et al. 2011 | Zuckerman et al. 2010 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 15 47 54.44 (0.02) | 15 47 54.45 (0.02) | 15 47 54.44 | 15 47 54.51 (0.02) | 15 47 54.45 | 15 47 54.43 | ||||||
| Declination | 24 20 40.87 (0.02) | 24 20 40.84 (0.03) | 24 20 40.87 | 24 20 39.89 (0.02) | 24 20 40.84 | 24 20 31.92 | ||||||
| Spectral type | DBA | DBA | DB | DB | DB4 | DB4 | ||||||
| Effective temperature | [K] | 12226.0 (79) | 12840.0 (332) | 12700.0 | 13004.0 (97) | |||||||
| log(g) | [cgs] | 8.03 (0.008) | 8.18 (0.1) | 8.13 (0.009) | ||||||||
| Mass | [M☉] | 0.605 (0.007) | 0.7 (0.08) | 0.668 (0.007) | ||||||||
| log(Luminosity) | [L☉] | -2.51 | ||||||||||
| Cooling age | [Gyr] | 0.4266 | ||||||||||
| log(H/He) | -5.0 | -5.02 (0.1) | ||||||||||
| log(C/He) | ||||||||||||
| log(Ca/He) | <-11.1 | |||||||||||
| 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] | 15.89 (0.04) | 15.93 (0.05) | 15.89 | 15.89 (0.04) | 15.93 (0.05) | ||||||
| Distance | [pc] | 62.91 (0.1) | 62.78 (0.2) | 58.00 | 62.91 | 62.91 (0.1) | 62.78 (0.2) | |||||
| Composition | He | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -53.14812935 (0.03) | -53.11638725 (0.07) | -53.148 (0.03) | -53.11638725 | |||||||
| Proper motion (declination) | [mas/yr] | 61.61603646 (0.03) | 61.45460534 (0.07) | 61.616 (0.04) | 61.45460534 | |||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | 15.50 | |||||||||||
| V magnitude | 15.78 | |||||||||||
| R magnitude | 16.35 (0.1) | |||||||||||
| I magnitude | ||||||||||||
| J magnitude | 15.91 (0.09) | |||||||||||
| H magnitude | 15.89 (0.2) | |||||||||||
| K magnitude | 15.78 (0.2) | |||||||||||
| u magnitude | 15.70 (0.005) | 15.70 (0.005) | ||||||||||
| g magnitude | 15.68 (0.004) | 15.68 (0.004) | ||||||||||
| r magnitude | 15.94 (0.004) | 15.94 (0.004) | ||||||||||
| i magnitude | 16.14 (0.005) | 16.14 (0.005) | ||||||||||
| z magnitude | 16.37 (0.008) | 16.37 (0.008) | ||||||||||
| G magnitude | 15.79 (0.001) | 15.82 | 15.79 | 15.79 (0.003) | 15.82 | |||||||
| BP magnitude | 15.77 (0.001) | 15.74 | 15.74 | |||||||||
| RP magnitude | 15.82 (0.002) | 15.82 | 15.82 | |||||||||
| Pan g magnitude | 15.75 (0.004) | |||||||||||
| Pan r magnitude | 15.94 (0.004) | |||||||||||
| Pan i magnitude | 16.15 (0.003) | |||||||||||
| Pan z magnitude | 16.35 (0.002) | |||||||||||
| Pan y magnitude | 16.50 (0.007) | |||||||||||
| E(B-V) | 0.008 | |||||||||||
* 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.