CONFIRMED
DRACO DWARF
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| Draco C-1 | IRAS - | GSC2.4.2 N4IT002785 | AAVSO 000-BJT-701 |
| SIMBAD [ALS82] C1 | Pan-STARRS 177402599901712536 | SAO - | VSX 239241 |
| GAIA DR3 1433154243632773248 | SkyMapper - | WRAY - | GCVS - |
| 2MASS J17195764+5750054 | HIP - | Hen - | BD - |
| WISE J171957.65+575005.4 | TYC - | ESO - | HD - |
| Bidelman (1954) | - | Allen (1984) | Draco C-1 (Conf.) | Belzcyński et al. (2001) | Draco C-1 (Conf.) |
| Gaposchkin (1957) | - | Kenyon (1986) | Draco C-1 (Conf.) | Akras et al. (2019) | Draco C-1 (Conf.) |
| Boyarchuk (1969) | - | Vaidis (1988, 1991) | Draco-C1 (Conf.) |
| Right ascension (°) | 259.9902Ref | Parallax (mas) | -0.027±0.043Ref | Reddening E(B-V) (mag) | 0.02±0.0Ref, Note |
| Declination (°) | 57.8349Ref | Distance (kpc) | 80±10Ref 11.75Ref, Note, 19.83Ref, Note |
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| Galactic longitude (°) | 86.2726Ref | Proper motion in α (mas/yr) | 0.03±0.05Ref | ||
| Galactic latitude (°) | 34.7592Ref | Proper motion in δ (mas/yr) | -0.24±0.06Ref |
| X-Ray | YesRef | IR type | SRef | Radio | YesRef |
| X-Ray type | αRef | J (mag) | 14.38Ref | Flickering | - |
| GALEX FUV (mag) | 18.77Ref | H (mag) | 13.71Ref | Outbursts | - |
| GALEX NUV (mag) | 20.15Ref | K (mag) | 13.46Ref | Outburst type | - |
| IUE | YesRef | WISE W1 (mag) | 13.25Ref | Jets | - |
| FUSE | NoRef | WISE W2 (mag) | 13.27Ref | Resolved nebula | NoRef |
| U (mag) | - | WISE W3 (mag) | 12.49Ref | IPmax (eV) | 77.5Ref |
| B (mag) | 18.43Ref | WISE W4 (mag) | 9.51Ref | [O III] lines | NoRef |
| V (mag) | 17.00Ref | IRAS 12μm (Jy) | - | He II lines | YesRef |
| R (mag) | 16.11Ref | IRAS 25μm (Jy) | - | [Fe VII] lines | NoRef |
| I (mag) | 15.67Ref | IRAS 60μm (Jy) | - | O VI lines | NoRef |
| BP (mag) | 17.38Ref | IRAS 100μm (Jy) | - | ||
| G (mag) | 16.62Ref | AKARI S09 (Jy) | - | ||
| RP (mag) | 15.76Ref | AKARI S18 (Jy) | - |
| Orbital period (days) | 1220±3.6Ref | γ velocity (km/h) | -298.99±0.03Ref | Size of giant’s orbit (AU) | - |
| Eccentricity | 0.1906±0.0077Ref | RV of giant (km/h) | 5.52244±0.043Ref | Separation (AU) | 2.227±0.07Ref |
| Inclination (°) | - | Inferior conj. of giant (JD) | - | Mass function | - |
| Eclipses | - | Mass ratio | 0.344Ref | ||
| Orbital ephemeris | - |
| Spectral type | C1.2Ref | Mass (M⊙) | 0.735±0.092Ref | Pulsation | Yes?Ref |
| Eff. temperature (K) | 3934±73Ref | Radius (R⊙) | 101.6±5.05Ref | Type | SRRef |
| IR type | SRef | Luminosity (L⊙) | 1730-2290Ref | Pulsation period (days) | 45.93Ref |
| Metallicity [Fe/H] | -1.34±0.19Ref | Pulsation ephemeris | - |
| Type/Spectral type | WDRef | Mass (M⊙) | 0.56±0.6Ref, >0.253±0.0115Ref | Spin period (min) | - |
| Shell-burning/Accreting-only | shell-burningRef | Radius (R⊙) | 0.21-0.30Ref, 0.17±0.06Ref | Accretion disk | - |
| Eff. temperature (K) | 180000±30000Ref | Luminosity (L⊙) | 7500-31000Ref | ||
| Lower limit (K) | - | ||||
| Upper limit (K) | - |
Discovered by Aaronson et al. (1982) in their search for carbon stars, Draco C-1 revealed an extremely high Zanstra temperature for the photoionization source. According to Munari (1991), the observed spectral characteristics align well with a scenario involving a white dwarf accreting at low rates from its carbon star companion. The spectrum exhibits numerous emission lines. A comprehensive analysis of X-ray, UV, and optical data obtained with XMM-Newton was presented in Saeedi et al. (2018). Furthermore, Lewis et al. (2020) prO VIded precise orbital parameters based on high-resolution spectroscopic observations.