All names: SDSS J225448.83+303107.1, Gaia DR3 1886301464050926720, Gaia DR2 1886301464050926720, SDSS J225448.83+303107.15, SDSS J225448.82+303107.3, Gaia EDR3 1886301464050926720
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Hollands et al. 2017 | Stilism | Kepler et al. 2016 | Vincent et al. 2024 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 22 54 48.84 (0.2) | 22 54 48.83 | 22 54 48.84 (0.3) | 22 54 48.84 | 22 54 48.81 (0.2) | ||||||
| Declination | 30 31 06.90 (0.3) | 30 31 07.14 | 30 31 06.92 (0.3) | 30 31 06.90 | 30 31 07.66 (0.3) | ||||||
| Spectral type | DZ | DZH | DZ | DZH | DZ | ||||||
| Effective temperature | [K] | 5900.0 (90) | 5900.0 (13) | 5398.0 (123) | |||||||
| log(g) | [cgs] | 8.00 (0) | 7.75 (0.07) | ||||||||
| Mass | [M☉] | 0.427 (0.06) | |||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | 3.5000 | |||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | -8.26 | -8.543 | |||||||||
| log(Ca/H) | |||||||||||
| log(N/He) | |||||||||||
| log(O/He) | |||||||||||
| log(Na/He) | -8.54 | ||||||||||
| log(Mg/He) | -6.95 | ||||||||||
| 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) | -9.01 | ||||||||||
| log(Mn/He) | |||||||||||
| log(Fe/He) | -7.25 | ||||||||||
| log(Co/He) | |||||||||||
| log(Ni/He) | |||||||||||
| log(Cu/He) | |||||||||||
| log(Zn/He) | |||||||||||
| log(Ga/He) | |||||||||||
| log(Ge/He) | |||||||||||
| log(Sr/He) | |||||||||||
| Parallax | [mas] | 8.38 (0.3) | 8.47 (0.5) | 8.38 | 8.38 (0.3) | ||||||
| Distance | [pc] | 119.37 (5) | 118.04 (6) | 120.00 (15) | 119.37 | 119.37 (5) | |||||
| Composition | He | He | |||||||||
| Proper motion (right ascension) | [mas/yr] | 21.78326691 (0.3) | 21.69859435 (0.6) | 21.783 (0.3) | |||||||
| Proper motion (declination) | [mas/yr] | -47.60396419 (0.3) | -48.40649044 (0.6) | -47.604 (0.3) | |||||||
| Variability | |||||||||||
| Magnetic | yes | ||||||||||
| Bd | [MG] | 2.53 (0.03) | |||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | |||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | 22.55 (0.3) | 22.46 (0.3) | 22.46 (0.3) | 22.53 (0.3) | |||||||
| g magnitude | 19.84 (0.02) | 19.86 (0.02) | 19.86 (0.02) | 19.85 (0.02) | |||||||
| r magnitude | 19.28 (0.01) | 19.33 (0.02) | 19.33 (0.02) | 19.29 (0.01) | |||||||
| i magnitude | 19.20 (0.02) | 19.24 (0.02) | 19.24 (0.02) | 19.20 (0.02) | |||||||
| z magnitude | 19.29 (0.06) | 19.30 (0.06) | 19.30 (0.06) | 19.28 (0.06) | |||||||
| G magnitude | 19.40 (0.04) | 19.43 | 19.40 | 19.40 (0.004) | |||||||
| BP magnitude | 19.87 (0.04) | 19.89 | |||||||||
| RP magnitude | 18.97 (0.03) | 18.97 | |||||||||
| Pan g magnitude | 19.75 (0.01) | ||||||||||
| Pan r magnitude | 19.29 (0.01) | ||||||||||
| Pan i magnitude | 19.25 (0.006) | ||||||||||
| Pan z magnitude | 19.41 (0.01) | ||||||||||
| Pan y magnitude | 19.42 (0.02) | ||||||||||
| E(B-V) | 0.017 | ||||||||||
* 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.