EGGR 89
All names: ** LDS 1288B, WD 1215+323, Gaia EDR3 4016142868162408576, WDS J12176+3205B, EGGR 89, SDSS J121732.83+320512.8, WD 1215+322, GSC2 N12232324294, G 148-B4B, Gaia DR3 4016142868162408576, USNO 729, CBS 57, Gaia DR2 4016142868162408576, J1217+3205, WD 1215+32, SDSS J121732.83+320512.9, GALEX J121732.7+320513, CSI+32-12150, 12175+3205N, LP 320-643, NLTT 30241, PM J12175+3205N, G148-B4B, WD 1215+324, GEN# +6.20020089, LSPM J1217+3205N, WDJ121732.91+320513.52, UBV 11036
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Caron et al. 2023 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Limoges et al. 2015 | Bergeron et al. 2001 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 17 32.61 (0.06) | 12 17 32.62 (0.09) | 12 17 32.61 | 12 17 32.91 (0.06) | 12 17 32.62 | 12 17 33.77 | |||||||||
| Declination | 32 05 11.13 (0.05) | 32 05 11.20 (0.07) | 32 05 11.13 | 32 05 13.52 (0.05) | 32 05 11.20 | 32 05 14.64 | |||||||||
| Spectral type | DC | DC | DC | DC | DC | DC | DC: | DC7 | DC7 | ||||||
| Effective temperature | [K] | 7067.0 (68) | 6818.0 (37) | 7048.0 | 6788.0 | 8530.0 (998) | 7100.0 (210) | 6913.0 (89) | |||||||
| log(g) | [cgs] | 8.13 (0.02) | 8.02 (0.01) | 8.19 | 8.08 | 9.02 (0.1) | 8.68 (0.1) | 8.12 (0.02) | |||||||
| Mass | [M☉] | 0.657 (0.01) | 0.589 (0.01) | 0.711 | 0.624 | 1.2 (0.05) | 1.02 (0.08) | 0.647 (0.02) | |||||||
| log(Luminosity) | [L☉] | -3.83 | -3.88 (0.1) | ||||||||||||
| Cooling age | [Gyr] | 1.8000 | 2.0500 | 1.9450 | 3.9100 (0.1) | ||||||||||
| log(H/He) | -3.4 | -3.4 | |||||||||||||
| log(C/He) | |||||||||||||||
| log(Ca/He) | |||||||||||||||
| log(Ca/H) | |||||||||||||||
| log(N/He) | |||||||||||||||
| log(O/He) | |||||||||||||||
| log(Na/He) | |||||||||||||||
| log(Mg/He) | |||||||||||||||
| 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) | |||||||||||||||
| log(Mn/He) | |||||||||||||||
| log(Fe/He) | |||||||||||||||
| log(Co/He) | |||||||||||||||
| log(Ni/He) | |||||||||||||||
| log(Cu/He) | |||||||||||||||
| log(Zn/He) | |||||||||||||||
| log(Ga/He) | |||||||||||||||
| log(Ge/He) | |||||||||||||||
| log(Sr/He) | |||||||||||||||
| Parallax | [mas] | 22.30 (0.07) | 22.34 (0.1) | 22.34 (0.1) | 32.20 (4) | 32.20 (4) | 22.30 | 22.30 (0.07) | 22.34 (0.1) | 24.60 (61) | |||||
| Distance | [pc] | 44.84 (0.1) | 44.76 (0.2) | 44.76 (0.2) | 31.10 (6) | 31.06 (3) | 44.84 | 44.84 (0.1) | 44.76 (0.2) | 40.65 (101) | |||||
| Composition | He | He | He | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -234.885701 (0.08) | -234.732488 (0.2) | -234.886 (0.07) | -234.732488 | ||||||||||
| Proper motion (declination) | [mas/yr] | -149.3856734 (0.07) | -149.6138803 (0.1) | -149.386 (0.07) | -149.6138803 | ||||||||||
| Variability | |||||||||||||||
| Magnetic | |||||||||||||||
| Bd | [MG] | ||||||||||||||
| Infrared excess (disk) | |||||||||||||||
| Binarity | yes | ||||||||||||||
| B magnitude | 17.33 | 17.33 | |||||||||||||
| V magnitude | 17.00 | 16.95 | |||||||||||||
| R magnitude | 16.77 | 13.90 | |||||||||||||
| I magnitude | 16.40 | ||||||||||||||
| J magnitude | 16.39 (0.03) | 16.39 | |||||||||||||
| H magnitude | 16.24 (0.03) | 16.24 | |||||||||||||
| K magnitude | 16.30 (0.03) | 16.37 | |||||||||||||
| u magnitude | 17.56 (0.01) | 17.56 (0.01) | 17.56 (0.01) | ||||||||||||
| g magnitude | 17.11 (0.004) | 17.11 (0.004) | |||||||||||||
| r magnitude | 16.95 (0.004) | 16.95 (0.004) | |||||||||||||
| i magnitude | 16.96 (0.005) | 16.96 (0.005) | |||||||||||||
| z magnitude | 17.04 (0.01) | 17.04 (0.01) | |||||||||||||
| G magnitude | 16.92 (0.008) | 16.94 | 16.92 | 16.92 (0.003) | 16.94 | ||||||||||
| BP magnitude | 17.08 (0.008) | 17.08 | 17.08 | ||||||||||||
| RP magnitude | 16.63 (0.007) | 16.63 | 16.63 | ||||||||||||
| Pan g magnitude | 17.10 (0.006) | 17.10 (0.006) | |||||||||||||
| Pan r magnitude | 16.95 (0.004) | 16.95 (0.005) | |||||||||||||
| Pan i magnitude | 16.99 (0.008) | 16.99 (0.006) | |||||||||||||
| Pan z magnitude | 16.98 (0.02) | 16.98 (0.02) | |||||||||||||
| Pan y magnitude | 16.96 (0.008) | 16.96 (0.009) | |||||||||||||
| E(B-V) | 0.001 | ||||||||||||||
* Constant surface field
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