All names: NLTT 58554, SDSS J235750.85+194908.5, WDJ235750.73+194905.90, Gaia DR2 2822330113802737408, LSPM J2357+1949, Gaia EDR3 2822330113802737408, USNO-B1.0 1098-00605257, TIC 283788205, J2357+1949, Gaia DR3 2822330113802737408, 2MASS J23575077+1949068, LP 404-7
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Caron et al. 2023 | Tremblay et al. 2020 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 23 57 50.93 (0.06) | 23 57 50.93 | 23 57 50.93 | 23 57 50.73 (0.06) | 23 57 50.93 | ||||||||
| Declination | 19 49 10.10 (0.05) | 19 49 09.97 | 19 49 10.10 | 19 49 05.90 (0.05) | 19 49 09.97 | ||||||||
| Spectral type | DZ | DZ | DZ | DZ | DZ | ||||||||
| Effective temperature | [K] | 5854.0 (10) | 6078.0 (15) | 5810.0 (50) | 6640.0 | 6411.0 | 5867.0 (39) | ||||||
| log(g) | [cgs] | 8.06 (0.005) | 8.16 (0.007) | 7.89 (0.04) | 8.28 | 8.17 | 8.03 (0.01) | ||||||
| Mass | [M☉] | 0.611 (0.005) | 0.674 (0.006) | 0.77 | 0.681 | 0.588 (0.01) | |||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | 3.5900 | 3.1820 | 2.9540 | |||||||||
| log(H/He) | -2.0 | ||||||||||||
| log(C/He) | |||||||||||||
| log(Ca/He) | -8.19 | -8.0 | |||||||||||
| 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] | 24.90 (0.09) | 24.92 (0.1) | 24.92 (0.1) | 24.90 | 24.90 (0.09) | 24.92 (0.1) | ||||||
| Distance | [pc] | 40.16 (0.1) | 40.13 (0.2) | 40.12 (0.2) | 40.16 | 40.16 (0.1) | 40.12 (0.2) | ||||||
| Composition | He | He | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 176.6197122 (0.09) | 176.8048578 (0.2) | 176.62 (0.09) | 176.8048578 | ||||||||
| Proper motion (declination) | [mas/yr] | 262.5771977 (0.05) | 262.5694256 (0.09) | 262.577 (0.05) | 262.5694256 | ||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | 17.80 | ||||||||||||
| V magnitude | |||||||||||||
| R magnitude | 16.70 | ||||||||||||
| I magnitude | |||||||||||||
| J magnitude | 16.36 (0.1) | 16.36 (0.1) | |||||||||||
| H magnitude | 16.26 (0.2) | 16.26 (0.2) | |||||||||||
| K magnitude | 15.90 (0.3) | 15.90 (0.3) | |||||||||||
| u magnitude | 20.15 (0.05) | 20.16 (0.05) | 20.16 (0.05) | ||||||||||
| g magnitude | 17.43 (0.005) | 17.43 (0.005) | |||||||||||
| r magnitude | 16.89 (0.005) | 16.89 (0.005) | |||||||||||
| i magnitude | 16.93 (0.006) | 16.93 (0.006) | |||||||||||
| z magnitude | 17.04 (0.01) | 17.04 (0.01) | |||||||||||
| G magnitude | 17.06 (0.006) | 17.08 | 17.06 | 17.06 (0.003) | 17.08 | ||||||||
| BP magnitude | 17.34 (0.006) | 17.38 | 17.38 | ||||||||||
| RP magnitude | 16.62 (0.005) | 16.61 | 16.61 | ||||||||||
| Pan g magnitude | 17.34 (0.003) | 17.34 (0.003) | |||||||||||
| Pan r magnitude | 16.92 (0.003) | 16.92 (0.003) | |||||||||||
| Pan i magnitude | 16.96 (0.002) | 16.96 (0.002) | |||||||||||
| Pan z magnitude | 17.06 (0.005) | 17.06 (0.005) | |||||||||||
| Pan y magnitude | 17.11 (0.008) | 17.11 (0.008) | |||||||||||
| E(B-V) | 0.002 | ||||||||||||
* 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.