All names: NLTT 21660, WDJ092430.85+312033.52, SDSS J092430.80+312032.3, J0924+3120, Gaia EDR3 700531568527365376, PM J09245+3120, LP 313-56, Gaia DR3 700531568527365376, 09245+3120, USNO-B1.0 1213-00171034, 2MASS J09243090+3120341, LSPM J0924+3120, SDSS J092430.79+312032.0, Gaia DR2 700531568527365376, PSO J141.1277+31.3412, WD 0921+315, TIC 307913089
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | O'Brien et al. 2024 | Caron et al. 2023 | McCleery et al. 2020 | Blouin et al. 2019 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Limoges et al. 2015 | Sayres et al. 2012 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 09 24 30.61 (0.1) | 09 24 30.80 | 09 24 30.61 (0.2) | 09 24 30.61 (0.2) | 09 24 30.89 | 09 24 30.61 | 09 24 30.85 (0.1) | 09 24 30.61 | 09 24 30.60 | ||||||||||
| Declination | 31 20 27.55 (0.1) | 31 20 32.07 | 31 20 27.74 (0.2) | 31 20 27.74 (0.2) | 31 20 33.80 | 31 20 27.55 | 31 20 33.51 (0.1) | 31 20 27.74 | 31 20 27.96 | ||||||||||
| Spectral type | DC | DC | DC | DC | DC | DC | DC: | DC | DC | DC | DA: | ||||||||
| Effective temperature | [K] | 4802.0 (94) | 4855.0 (19) | 4686.6 (56) | 4795.0 (25) | 4807.0 | 4491.0 | 4800.0 (71) | 4810.0 (60) | 4830.0 (56) | |||||||||
| log(g) | [cgs] | 8.00 (0.08) | 8.08 (0.01) | 7.94 (0.06) | 8.01 (0.03) | 8.02 | 7.79 | 8.00 (0) | 8.02 (0.03) | ||||||||||
| Mass | [M☉] | 0.578 (0.05) | 0.63 (0.01) | 0.584 (0.02) | 0.588 | 0.45 | 0.58 (0.1) | 0.588 (0.03) | |||||||||||
| log(Luminosity) | [L☉] | -4.12 | |||||||||||||||||
| Cooling age | [Gyr] | 7.7300 | 6.6620 (0.3) | 6.6950 | 4.9510 | ||||||||||||||
| 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] | 26.19 (0.2) | 26.19 (0.2) | 26.39 (0.3) | 26.39 (0.3) | 26.39 (0.3) | 26.39 (0.3) | 26.19 | 26.19 (0.2) | 26.39 (0.3) | |||||||||
| Distance | [pc] | 38.19 (0.2) | 38.18 (0.2) | 37.89 (0.4) | 37.89 (0.4) | 37.89 (0.4) | 37.89 (0.4) | 38.80 (4) | 38.10 | 38.19 | 38.19 (0.2) | 37.89 (0.4) | |||||||
| Composition | H | H | H | He | |||||||||||||||
| Proper motion (right ascension) | [mas/yr] | -196.4972678 (0.2) | -196.7195223 (0.4) | -196.497 (0.2) | -196.72 | ||||||||||||||
| Proper motion (declination) | [mas/yr] | -372.7555866 (0.1) | -373.1430862 (0.3) | -372.756 (0.1) | -373.143 | ||||||||||||||
| Variability | |||||||||||||||||||
| Magnetic | |||||||||||||||||||
| Bd | [MG] | ||||||||||||||||||
| Infrared excess (disk) | |||||||||||||||||||
| Binarity | |||||||||||||||||||
| B magnitude | 18.10 | ||||||||||||||||||
| V magnitude | |||||||||||||||||||
| R magnitude | 17.40 | ||||||||||||||||||
| I magnitude | |||||||||||||||||||
| J magnitude | 16.64 (0.007) | 16.47 (0.1) | 16.47 | 16.64 (0.01) | 16.47 (0.1) | ||||||||||||||
| H magnitude | 16.41 (0.02) | 15.97 (0.2) | 15.97 | 15.97 (0.2) | 15.97 (0.2) | ||||||||||||||
| K magnitude | 16.40 (0.04) | 16.91 | 16.91 | ||||||||||||||||
| u magnitude | 20.66 (0.06) | 20.54 (0.07) | 20.56 | 20.53 (0.08) | 20.66 (0.06) | 20.54 (0.07) | |||||||||||||
| g magnitude | 18.73 (0.008) | 18.75 | 18.73 (0.009) | 18.62 (0.01) | 18.73 (0.009) | ||||||||||||||
| r magnitude | 17.93 (0.007) | 17.95 | (0.007) | 17.93 (0.003) | 17.94 (0.007) | ||||||||||||||
| i magnitude | 17.64 (0.007) | 17.64 | 17.63 (0.007) | 17.65 (0.005) | 17.63 (0.007) | ||||||||||||||
| z magnitude | 17.50 (0.02) | 17.55 | 17.52 (0.02) | 17.55 (0.005) | 17.52 (0.02) | ||||||||||||||
| G magnitude | 17.97 (0.02) | 17.99 | 17.99 | 17.97 | 17.97 (0.003) | 17.99 | |||||||||||||
| BP magnitude | 18.50 (0.02) | 18.53 | 18.53 | ||||||||||||||||
| RP magnitude | 17.31 (0.01) | 17.30 | 17.30 | ||||||||||||||||
| Pan g magnitude | 18.62 (0.009) | 18.62 (0.01) | 18.62 (0.01) | ||||||||||||||||
| Pan r magnitude | 17.93 (0.003) | 17.93 (0.003) | 17.93 (0.003) | ||||||||||||||||
| Pan i magnitude | 17.65 (0.005) | 17.65 (0.005) | 17.65 (0.005) | ||||||||||||||||
| Pan z magnitude | 17.55 (0.005) | 17.55 (0.005) | 17.55 (0.005) | ||||||||||||||||
| Pan y magnitude | 17.50 (0.009) | 17.50 (0.007) | 17.50 (0.007) | ||||||||||||||||
| 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.