Ross 198

All names: NLTT 51286, CSI+55-21249, UBV M 42730, Gaia DR2 2177776331525931136, GJ 9741, TIC 316271332, Lan 82, WD 2124+55, Gaia EDR3 2177776331525931136, LAWD 85, Lan 082, 2MASS J21262546+5513324, uvby98 980231043, LSPM J2126+5513, PM J21264+5513, Gaia DR3 2177776331525931136, UBV 18501, G 231-43, 21264+5513, KPD 2124+5459, UBV 18243, LTT 16270, EGGR 143, GJ 828.3, USNO 266, PLX 5166.01, CSI+54-21247, UBV M 43027, GEN# +9.80231043, WD 2124+550, Ross 198, G 232-14, WDJ212625.46+551332.38, USNO-B1.0 1452-00354740

Parameter Unit Gaia EDR3 Pan-STARRS DR1 O'Brien et al. 2024 McCleery et al. 2020 MWDD H Gaia DR2 Bedard et al. 2017 Stilism Limoges et al. 2015 Gianninas et al. 2011 Lepine et al. 2011 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 21 26 25.96 (0.02) 21 26 25.95 (0.03) 21 26 25.95 (0.03) 21 26 25.96 21 26 25.46 (0.02) 21 26 25.95 21 26 24.00
Declination 55 13 35.42 (0.02) 55 13 35.33 (0.03) 55 13 35.33 (0.03) 55 13 35.42 55 13 32.38 (0.02) 55 13 35.33 55 13 27.12
Spectral type DA DA DA DA DA DA DA3.5 DA DA3.6 DA4
Effective temperature [K] 13073.0 (200) 12798.1 (81) 13015.0 14620.0 (383) 13920.0 (271) 14040.0 (253) 14800.0 (387) 13662.0 (99)
log(g) [cgs] 8.37 (0.01) 8.37 (0.008) 8.39 8.48 (0.05) 8.53 (0.05) 8.41 (0.05) 8.46 (0.05) 8.40 (0.005)
Mass [M] 0.84 (0.009) 0.85 0.85 (0.3) 0.94 (0.03) 0.87 (0.03) 0.9 (0.03) 0.863 (0.004)
log(Luminosity) [L] -2.59
Cooling age [Gyr] 0.5401 0.4270
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] 29.66 (0.02) 29.66 (0.02) 29.78 (0.03) 29.78 (0.03) 27.80 (3) 29.66 29.66 (0.02) 29.78 (0.03) 29.00 (4)
Distance [pc] 33.72 (0.03) 33.72 (0.02) 33.58 (0.04) 33.58 (0.04) 33.20 (5) 36.00 (4) 35.00 47.00 33.72 33.72 (0.03) 33.58 (0.04) 34.48 (5)
Composition H H H H
Proper motion (right ascension) [mas/yr] 272.2023352 (0.03) 271.8220147 (0.07) 272.202 (0.03) 271.8220147
Proper motion (declination) [mas/yr] 189.8879501 (0.03) 190.1835819 (0.06) 189.888 (0.03) 190.1835819
Variability NOV
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 14.88
V magnitude 14.75
R magnitude 15.00
I magnitude 14.80
J magnitude 14.99 (0.05)
H magnitude 14.96 (0.09)
K magnitude 14.90 (0.2)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 14.76 (0.0009) 14.77 14.77 14.76 14.76 (0.003) 14.77
BP magnitude 14.74 (0.0009) 14.73 14.73
RP magnitude 14.79 (0.002) 14.80 14.80
Pan g magnitude 14.68 (0.003)
Pan r magnitude 14.88 (0.0008)
Pan i magnitude 15.12 (0.002)
Pan z magnitude 15.34 (0.004)
Pan y magnitude 15.49 (0.003)
E(B-V) 0.002

* Constant surface field

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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.