All names: SDSS J124740.09+303006.9, Ton 644, SDSS J124740.09+303007.0, SDSS J124740.10+303007.0, Gaia EDR3 1465214177336901376, GALEX J124740.1+303007, WDJ124740.10+303007.41, KUV 12452+3046, Gaia DR2 1465214177336901376, Gaia DR3 1465214177336901376, WIRED J124740.09+303007.0, J1247+3030
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Caron et al. 2023 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 47 40.10 (0.1) | 12 47 40.10 | 12 47 40.10 (0.1) | 12 47 40.10 | 12 47 40.10 (0.1) | 12 47 40.10 | 12 47 40.10 | |||||||
| Declination | 30 30 06.40 (0.07) | 30 30 06.94 | 30 30 06.44 (0.08) | 30 30 06.40 | 30 30 07.41 (0.07) | 30 30 06.44 | 30 30 07.02 | |||||||
| Spectral type | DA | DA | DA | DA | DA | |||||||||
| Effective temperature | [K] | 7644.0 (50) | 7492.0 | 7213.0 | 7549.0 (139) | 7230.0 (37) | ||||||||
| log(g) | [cgs] | 8.17 (0.02) | 8.11 | 8.01 | 8.12 (0.03) | 7.97 (0.06) | ||||||||
| Mass | [M☉] | 0.697 (0.01) | 0.663 | 0.579 | 0.669 (0.03) | 0.577 (0.03) | ||||||||
| log(Luminosity) | [L☉] | |||||||||||||
| Cooling age | [Gyr] | 1.6100 | 1.4900 | 1.4540 | ||||||||||
| 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] | 12.15 (0.1) | 12.18 (0.1) | 12.18 (0.1) | 12.15 | 12.15 (0.1) | 12.18 (0.1) | |||||||
| Distance | [pc] | 82.30 (0.8) | 82.10 (0.9) | 82.12 (1) | 82.30 | 82.30 (0.8) | 82.12 (1) | |||||||
| Composition | H | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | 1.096172901 (0.1) | 1.214038141 (0.2) | 1.096 (0.1) | 1.214038141 | |||||||||
| Proper motion (declination) | [mas/yr] | -62.56355204 (0.1) | -62.53778952 (0.1) | -62.564 (0.1) | -62.53778952 | |||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | ||||||||||||||
| V magnitude | ||||||||||||||
| R magnitude | ||||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | 17.40 (0.03) | |||||||||||||
| H magnitude | 17.29 (0.04) | |||||||||||||
| K magnitude | 17.38 (0.08) | |||||||||||||
| u magnitude | 18.56 (0.02) | 18.54 (0.02) | 18.56 (0.02) | 18.56 (0.02) | 18.54 (0.03) | |||||||||
| g magnitude | 18.08 (0.006) | 18.08 (0.006) | 18.08 (0.006) | 18.07 (0.03) | ||||||||||
| r magnitude | 17.98 (0.007) | 17.98 (0.007) | 17.98 (0.007) | 17.97 (0.02) | ||||||||||
| i magnitude | 17.96 (0.008) | 17.96 (0.008) | 17.96 (0.008) | 17.97 (0.01) | ||||||||||
| z magnitude | 18.03 (0.02) | 18.03 (0.02) | 18.03 (0.02) | 18.02 (0.03) | ||||||||||
| G magnitude | 17.91 (0.02) | 17.93 | 17.91 | 17.91 (0.003) | 17.93 | |||||||||
| BP magnitude | 18.09 (0.02) | 18.10 | 18.10 | |||||||||||
| RP magnitude | 17.63 (0.01) | 17.64 | 17.64 | |||||||||||
| Pan g magnitude | 18.06 (0.006) | 18.06 (0.006) | ||||||||||||
| Pan r magnitude | 17.95 (0.005) | 17.95 (0.006) | ||||||||||||
| Pan i magnitude | 17.96 (0.007) | 17.96 (0.009) | ||||||||||||
| Pan z magnitude | 18.00 (0.005) | 18.00 (0.005) | ||||||||||||
| Pan y magnitude | 18.09 (0.01) | 18.09 (0.01) | ||||||||||||
| E(B-V) | 0.003 | |||||||||||||
* 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.