LB 181
All names: HBQS 0254+0034, WD 0254+005, SDSS J025709.00+004628.1, SDSS J025708.99+004627.8, LAMOST J025708.99+004628.0, [LCB92] 0254+0034, GALEX J025708.9+004627, LB 181, Gaia EDR3 288175125714560, SDSS J025708.99+004627.7, Gaia DR2 288175125714560, SDSS J025709.00+004628.0, Gaia DR3 288175125714560, PB 6943, [HH86] 0254+005, KUV 02546+0034, SDSS J025709.00+004627.9, SDSS J025708.99+004628.0, US 3406
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | MWDD H | Gaia DR2 | Stilism | Tremblay et al. 2011 | Vincent et al. 2024 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Kleinman et al. 2004 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 02 57 08.98 (0.1) | 02 57 08.99 | 02 57 08.98 (0.2) | 02 57 08.98 | 02 57 09.00 (0.1) | 02 57 09.00 | 02 57 08.30 | 02 57 09.00 | 02 57 09.00 | ||||||
| Declination | 00 46 27.65 (0.1) | 00 46 27.75 | 00 46 27.66 (0.1) | 00 46 27.65 | 00 46 27.95 (0.1) | 00 46 27.96 | 00 46 25.32 | 00 46 28.09 | 00 46 28.09 | ||||||
| Spectral type | DA | DA | DA | DA | DA | DA | DA | DA | |||||||
| Effective temperature | [K] | 11890.0 | 12690.0 (130) | 12124.0 (406) | 12215.0 (83) | 12230.0 (86) | 12269.0 (87) | ||||||||
| log(g) | [cgs] | 7.86 | 8.15 (0.03) | 7.90 (0.03) | 8.01 (0.03) | 8.13 (0.03) | 8.03 (0.03) | ||||||||
| Mass | [M☉] | 0.528 | 0.7 (0.02) | 0.551 (0.03) | 0.679 (0.02) | ||||||||||
| log(Luminosity) | [L☉] | ||||||||||||||
| Cooling age | [Gyr] | 0.3208 | 0.4074 | ||||||||||||
| 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] | 6.52 (0.1) | 6.44 (0.2) | 6.52 | 6.52 (0.1) | ||||||||||
| Distance | [pc] | 153.38 (3) | 155.19 (4) | 153.38 | 153.38 (3) | ||||||||||
| Composition | H | H | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | -18.37357126 (0.1) | -18.31246179 (0.3) | -18.374 (0.1) | -14.7 | -18.0 | |||||||||
| Proper motion (declination) | [mas/yr] | -18.7066144 (0.1) | -18.76900504 (0.2) | -18.707 (0.1) | -15.6 | -16.0 | |||||||||
| Variability | |||||||||||||||
| Magnetic | |||||||||||||||
| Bd | [MG] | ||||||||||||||
| Infrared excess (disk) | |||||||||||||||
| Binarity | |||||||||||||||
| B magnitude | 17.80 | ||||||||||||||
| V magnitude | 17.85 | ||||||||||||||
| R magnitude | |||||||||||||||
| I magnitude | |||||||||||||||
| J magnitude | 17.69 (0.03) | ||||||||||||||
| H magnitude | 17.70 (0.05) | ||||||||||||||
| K magnitude | 17.64 (0.08) | ||||||||||||||
| u magnitude | 17.79 (0.01) | 17.79 (0.01) | 17.80 (0.05) | 17.39 | 17.80 (0.05) | 17.79 (0.04) | |||||||||
| g magnitude | 17.37 (0.005) | 17.37 (0.005) | 17.39 (0.02) | 17.39 | 17.39 (0.02) | 17.38 (0.02) | |||||||||
| r magnitude | 17.61 (0.006) | 17.61 (0.006) | 17.59 (0.01) | 17.58 (0.01) | 17.60 (0.02) | ||||||||||
| i magnitude | 17.81 (0.007) | 17.81 (0.007) | 17.78 (0.02) | 17.77 (0.02) | 17.79 (0.02) | ||||||||||
| z magnitude | 18.03 (0.02) | 18.03 (0.02) | 18.07 (0.03) | 18.05 (0.03) | 18.08 (0.02) | ||||||||||
| G magnitude | 17.47 (0.01) | 17.50 | 17.47 | 17.47 (0.003) | |||||||||||
| BP magnitude | 17.49 (0.01) | 17.47 | |||||||||||||
| RP magnitude | 17.52 (0.01) | 17.52 | |||||||||||||
| Pan g magnitude | 17.39 (0.004) | ||||||||||||||
| Pan r magnitude | 17.58 (0.003) | ||||||||||||||
| Pan i magnitude | 17.81 (0.002) | ||||||||||||||
| Pan z magnitude | 18.01 (0.005) | ||||||||||||||
| Pan y magnitude | 18.16 (0.01) | ||||||||||||||
| E(B-V) | 0.009 | ||||||||||||||
* Constant surface field
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