All names: PG 1539+043, Gaia DR3 4424645557102354432, SDSS J154213.60+040836.0, Gaia DR2 4424645557102354432, PG1539+043, TIC 459417741, LAMOST J154213.59+040836.1, 2MASS J15421356+0408363
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 15 42 13.61 | 15 42 13.60 (0.04) | ||
| Declination | 04 08 36.35 | 04 08 36.11 (0.03) | ||
| Spectral type | He-sdO | sdOC | ||
| Effective temperature | [K] | 74101.0 (5102) | ||
| log(g) | [cgs] | 5.65 (0.1) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.16 (0.07) | 0.12 (0.05) | |
| Distance | [pc] | 6161.43 (2673) | 8271.30 (3366) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -6.1 (0.1) | -5.93 (0.06) | |
| Proper motion (declination) | [mas/yr] | -3.554 (0.1) | -3.718 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.98 | |||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 16.50 (0.1) | 16.59 (0.02) | ||
| H magnitude | 16.51 (0.2) | 16.59 (0.02) | ||
| K magnitude | 16.05 | 16.57 (0.04) | ||
| u magnitude | 15.23 (0.004) | 15.25 (0.02) | ||
| g magnitude | 15.61 (0.003) | 15.67 (0.02) | ||
| r magnitude | 16.12 (0.004) | 16.14 (0.02) | ||
| i magnitude | 16.46 (0.005) | 16.48 (0.01) | ||
| z magnitude | 16.76 (0.01) | 16.77 (0.02) | ||
| G magnitude | 15.90 (0.002) | 15.88 (0.003) | ||
| BP magnitude | 15.66 (0.01) | |||
| RP magnitude | 16.14 (0.005) | |||
| Pan g magnitude | 15.71 (0.007) | |||
| Pan r magnitude | 16.13 (0.002) | |||
| Pan i magnitude | 16.49 (0.005) | |||
| Pan z magnitude | 16.76 (0.01) | |||
| Pan y magnitude | 16.95 (0.008) | |||
| E(B-V) | 0.041 | |||
* 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.