CONFIRMED
SMC
|
| SMC3 | IRAS - | GSC2.4.2 S0XO694778 | AAVSO 000-BJP-582 |
| SIMBAD NAME SMC Symbiotic star 3 | Pan-STARRS - | SAO - | VSX 237637 |
| GAIA DR3 4685877768887752960 | SkyMapper 004820.14-733152.3 | WRAY - | GCVS - |
| 2MASS J00482000-7331521 | HIP - | Hen - | BD - |
| WISE J004820.05-733152.0 | TYC - | ESO - | HD - |
| Bidelman (1954) | - | Allen (1984) | - | Belzcyński et al. (2001) | SMC3 (Conf.) |
| Gaposchkin (1957) | - | Kenyon (1986) | - | Akras et al. (2019) | SMC3 (Conf.) |
| Boyarchuk (1969) | - | Vaidis (1988, 1991) | - |
| Right ascension (°) | 12.0834Ref | Parallax (mas) | 0.002±0.017Ref | Reddening E(B-V) (mag) | 0.24±0.05Ref, Note |
| Declination (°) | -73.5311Ref | Distance (kpc) | 62.1±1.9Ref 18.97Ref, Note, 17.69Ref, Note |
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| Galactic longitude (°) | 303.2357Ref | Proper motion in α (mas/yr) | 0.67±0.02Ref | ||
| Galactic latitude (°) | -43.5953Ref | Proper motion in δ (mas/yr) | -1.28±0.02Ref |
| X-Ray | YesRef | IR type | SRef | Radio | - |
| X-Ray type | αRef | J (mag) | 11.94Ref | Flickering | - |
| GALEX FUV (mag) | - | H (mag) | 11.04Ref | Outbursts | YesRef |
| GALEX NUV (mag) | - | K (mag) | 10.80Ref | Outburst type | SyN?Ref |
| IUE | YesRef | WISE W1 (mag) | 10.56Ref | Jets | - |
| FUSE | YesRef | WISE W2 (mag) | 10.63Ref | Resolved nebula | - |
| U (mag) | 16.66Ref | WISE W3 (mag) | 10.22Ref | IPmax (eV) | 233.6Ref |
| B (mag) | 16.23Ref | WISE W4 (mag) | 9.28Ref | [O III] lines | NoRef |
| V (mag) | 14.74Ref | IRAS 12μm (Jy) | - | He II lines | YesRef |
| R (mag) | 14.00Ref | IRAS 25μm (Jy) | - | [Fe VII] lines | NoRef |
| I (mag) | 13.13Ref | IRAS 60μm (Jy) | - | O VI lines | YesRef |
| BP (mag) | 15.43Ref | IRAS 100μm (Jy) | - | ||
| G (mag) | 14.44Ref | AKARI S09 (Jy) | - | ||
| RP (mag) | 13.40Ref | AKARI S18 (Jy) | - |
| Orbital period (days) | 1634±7Ref | γ velocity (km/h) | 202.43±2.87Ref | Size of giant’s orbit (AU) | - |
| Eccentricity | - | RV of giant (km/h) | - | Separation (AU) | 3.9Ref |
| Inclination (°) | >60Ref, 90Ref | Inferior conj. of giant (JD) | - | Mass function | - |
| Eclipses | Yes?Ref | Mass ratio | 3.75Ref, 2Ref, 0.59Ref |
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| Orbital ephemeris | Min (X-ray) = 2449382±10 + 1634±7 x ERef |
| Spectral type | M0 IIIRef | Mass (M⊙) | 0.8Ref, 2Ref, 3Ref |
Pulsation | YesRef |
| Eff. temperature (K) | 3700±100Ref | Radius (R⊙) | 110Ref, 199-245Ref | Type | - |
| IR type | SRef | Luminosity (L⊙) | - | Pulsation period (days) | 110±2Ref |
| Metallicity [Fe/H] | - | Pulsation ephemeris | - |
| Type/Spectral type | WDRef | Mass (M⊙) | 0.8Ref, 1Ref, 1.35Ref |
Spin period (min) | - |
| Shell-burning/Accreting-only | shell-burningRef | Radius (R⊙) | 0.115Ref | Accretion disk | - |
| Eff. temperature (K) | 100000-170000Ref, 439000-520000Ref | Luminosity (L⊙) | 900Ref, 1200-3500Ref | ||
| Lower limit (K) | - | ||||
| Upper limit (K) | - |
The star is located in the line of sight to the cluster NGC 269. The white dwarf appears to be very massive because SMC3 is one of the strongest X-ray sources among symbiotic binaries and shows unusually high ionization. The outburst of the system was observed between 1980 and 1981 (Morgan, 1992). According to the analysis of Kato et al. (2013), the giant almost fills its Roche lobe.