All names: SDSS J231825.23-093539.2, WD 2315-098, Gaia DR3 2437912708105361536, SBC9 3411, WIRED J231825.23-093539.1, [SGR2010] J2318-0935, 2MASS J23182522-0935389, [HHD2009] SDSS J2318-0935, Gaia DR2 2437912708105361536, Gaia EDR3 2437912708105361536, SDSS J231825.22-093539.0, SDSS J231825.23-093539.1, TIC 49554990
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Tremblay et al. 2011 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 23 18 25.22 (0.1) | 23 18 25.23 | 23 18 25.22 (0.2) | 23 18 25.23 | 23 18 25.23 (0.1) | 23 18 25.23 | 23 18 24.91 | 23 18 25.23 | |||||
| Declination | -09 35 39.34 (0.1) | -09 35 39.08 | -09 35 39.34 (0.2) | -09 35 39.08 | -09 35 39.07 (0.1) | -09 35 39.05 | -09 35 35.16 | -09 35 39.15 | |||||
| Spectral type | DA+M | DA | DA+M | DA+M | DA+M | DA+M | DA+MS | ||||||
| Effective temperature | [K] | 22550.0 (603) | 24480.0 (450) | 9192.0 (47) | 9160.0 (50) | ||||||||
| log(g) | [cgs] | 7.75 (0.1) | 7.76 (0.07) | 8.59 (0.05) | 8.48 (0.06) | ||||||||
| Mass | [M☉] | 0.5 (0.05) | 0.51 (0.03) | ||||||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | 0.0195 | |||||||||||
| 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] | 2.57 (0.2) | 2.68 (0.2) | 2.57 (0.2) | |||||||||
| Distance | [pc] | 388.53 (26) | 373.60 (30) | 768.00 (175) | 388.53 (26) | ||||||||
| Composition | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -11.9427166 (0.2) | -11.71017993 (0.3) | -11.943 (0.2) | -13.2 | ||||||||
| Proper motion (declination) | [mas/yr] | -17.02625381 (0.1) | -17.45261084 (0.3) | -17.026 (0.1) | -18.3 | ||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | WDMS | WDMS | yes | WDMS | WDMS | ||||||||
| B magnitude | |||||||||||||
| V magnitude | |||||||||||||
| R magnitude | |||||||||||||
| I magnitude | |||||||||||||
| J magnitude | 16.53 (0.1) | ||||||||||||
| H magnitude | 16.13 (0.2) | ||||||||||||
| K magnitude | 15.43 (0.2) | ||||||||||||
| u magnitude | 18.37 (0.02) | 18.36 | 18.37 (0.02) | 18.36 (0.02) | 18.36 | 18.33 (0.02) | |||||||
| g magnitude | 18.32 (0.007) | 18.33 | 18.30 (0.007) | 18.33 (0.01) | 18.33 | 18.31 (0.01) | |||||||
| r magnitude | 18.49 (0.009) | 18.51 | 18.48 (0.01) | 18.51 (0.02) | 18.51 | 18.49 (0.02) | |||||||
| i magnitude | 18.15 (0.009) | 18.15 | 18.12 (0.01) | 18.15 (0.02) | 18.15 | 18.13 (0.02) | |||||||
| z magnitude | 17.69 (0.02) | 17.76 | 17.75 (0.03) | 17.76 (0.03) | 17.75 | 17.71 (0.03) | |||||||
| G magnitude | 18.20 (0.03) | 18.22 | 18.20 (0.003) | ||||||||||
| BP magnitude | 18.32 (0.03) | 18.33 | |||||||||||
| RP magnitude | 17.74 (0.02) | 17.76 | |||||||||||
| Pan g magnitude | 18.35 (0.003) | ||||||||||||
| Pan r magnitude | 18.52 (0.005) | ||||||||||||
| Pan i magnitude | 18.18 (0.005) | ||||||||||||
| Pan z magnitude | 17.81 (0.007) | ||||||||||||
| Pan y magnitude | 17.60 (0.01) | ||||||||||||
| E(B-V) | 0.023 | ||||||||||||
* 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.