All names: LAMOST J154023.46+264829.7, WISE J154023.46+264829.7, WD 1538+269, UBV 13378, WISEA J154023.46+264829.6, 2MASS J15402345+2648297, TIC 283870336, Gaia DR2 1223920926079402112, GEN# +6.10070245, PG1538+269, PG 1538+269, Gaia DR3 1223920926079402112, [TFW97] J154023.44+264829.79, Ton 245, UBV M 43127, Gaia EDR3 1223920926079402112, GSC 02036-00469, uvby98 610070245, FB 160, UCAC4 585-051951, CSI+26-15384
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Gaia DR2 | Stilism | Simbad | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|
| Right ascension | 15 40 23.47 (0.01) | 15 40 23.42 | 15 40 23.47 (0.02) | 15 40 23.46 (0.01) | 15 40 23.09 | ||
| Declination | 26 48 29.67 (0.02) | 26 48 30.21 | 26 48 29.67 (0.04) | 26 48 29.78 (0.02) | 26 48 23.04 | ||
| Spectral type | sdB+WD | sdB | DA2.0 sd | ||||
| Effective temperature | [K] | 25200.0 (1000) | |||||
| log(g) | [cgs] | 5.30 (0.1) | |||||
| Mass | [M☉] | ||||||
| log(Luminosity) | [L☉] | ||||||
| Cooling age | [Gyr] | ||||||
| log(H/He) | |||||||
| log(C/He) | |||||||
| log(Ca/He) | |||||||
| log(Ca/H) | |||||||
| Parallax | [mas] | 1.21 (0.03) | 1.21 (0.05) | 1.21 (0.05) | 1.21 (0.03) | ||
| Distance | [pc] | 826.99 (20) | 828.64 (32) | 828.66 (32) | 826.99 (20) | ||
| Composition | |||||||
| Proper motion (right ascension) | [mas/yr] | 9.52990448 (0.02) | 9.526 (0.05) | 9.526166193 (0.05) | 9.53 (0.02) | ||
| Proper motion (declination) | [mas/yr] | -7.30567827 (0.03) | -7.304 (0.07) | -7.304006654 (0.07) | -7.306 (0.03) | ||
| Variability | |||||||
| Magnetic | |||||||
| Bd | [MG] | ||||||
| Infrared excess (disk) | |||||||
| Binarity | |||||||
| B magnitude | 13.65 (0.05) | ||||||
| V magnitude | 13.86 (0.04) | ||||||
| R magnitude | 14.07 (0.1) | ||||||
| I magnitude | |||||||
| J magnitude | 14.37 (0.03) | 14.37 (0.03) | |||||
| H magnitude | 14.49 (0.05) | 14.49 (0.05) | |||||
| K magnitude | 14.52 (0.08) | 14.52 (0.08) | |||||
| u magnitude | 14.54 (0.007) | 14.92 | |||||
| g magnitude | 14.01 (0.005) | 13.68 (0.04) | 14.15 | ||||
| r magnitude | 14.08 (0.003) | 14.06 (0.04) | 14.14 | ||||
| i magnitude | 15.27 (0.009) | 14.46 (0.1) | 15.22 | ||||
| z magnitude | 15.32 (0.009) | 14.82 | |||||
| G magnitude | 13.80 (0.0007) | 13.82 (0.0003) | 13.82 | 13.80 (0.003) | |||
| BP magnitude | 13.68 (0.0007) | 13.62 (0.004) | 13.62 | ||||
| RP magnitude | 14.03 (0.0007) | 14.03 (0.001) | 14.03 | ||||
| Pan g magnitude | 13.63 (0.008) | ||||||
| Pan r magnitude | 14.03 (0.003) | ||||||
| Pan i magnitude | 14.36 (0.002) | ||||||
| Pan z magnitude | 14.62 (0.003) | ||||||
| Pan y magnitude | 14.79 (0.02) | ||||||
| E(B-V) | 0.036 | ||||||
* 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.