CONFIRMED
MILKY WAY
|
| AS 201 | IRAS 08296-2735 | GSC2.4.2 S65H001844 | AAVSO 000-BCZ-699 |
| SIMBAD EM* AS 201 | Pan-STARRS 74681279286729806 | SAO - | VSX 235345 |
| GAIA DR3 5646499053433949440 | SkyMapper 083142.88-274531.5 | WRAY 15-228 | GCVS - |
| 2MASS J08314288-2745315 | HIP - | Hen 3-172 | BD - |
| WISE J083142.87-274531.5 | TYC - | ESO - | HD - |
| Bidelman (1954) | - | Allen (1984) | AS 201 (Conf.) | Belzcyński et al. (2001) | AS 201 (Conf.) |
| Gaposchkin (1957) | - | Kenyon (1986) | AS 201 (Conf.) | Akras et al. (2019) | AS 201 (Conf.) |
| Boyarchuk (1969) | - | Vaidis (1988, 1991) | MHA 382-43 (Conf.) |
| Right ascension (°) | 127.9287Ref | Parallax (mas) | 0.416±0.022Ref | Reddening E(B-V) (mag) | 0.12±0.0Ref, Note |
| Declination (°) | -27.7588Ref | Distance (kpc) | 2Ref, 2.3Ref 2.22Ref, Note, 2.19Ref, Note |
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| Galactic longitude (°) | 249.0776Ref | Proper motion in α (mas/yr) | -2.20±0.02Ref | ||
| Galactic latitude (°) | 6.9687Ref | Proper motion in δ (mas/yr) | 1.49±0.02Ref |
| X-Ray | NoRef, Yes?Ref | IR type | D'Ref | Radio | YesRef |
| X-Ray type | βRef | J (mag) | 10.54Ref | Flickering | - |
| GALEX FUV (mag) | - | H (mag) | 10.22Ref | Outbursts | - |
| GALEX NUV (mag) | - | K (mag) | 10.00Ref | Outburst type | - |
| IUE | YesRef | WISE W1 (mag) | 9.12Ref | Jets | - |
| FUSE | NoRef | WISE W2 (mag) | 8.34Ref | Resolved nebula | YesRef |
| U (mag) | - | WISE W3 (mag) | 3.91Ref | IPmax (eV) | 54.4Ref |
| B (mag) | 12.52Ref | WISE W4 (mag) | 1.35Ref | [O III] lines | YesRef |
| V (mag) | 11.81Ref | IRAS 12μm (Jy) | 1.00Ref | He II lines | YesRef |
| R (mag) | - | IRAS 25μm (Jy) | 2.81Ref | [Fe VII] lines | NoRef |
| I (mag) | - | IRAS 60μm (Jy) | 2.46Ref | O VI lines | NoRef |
| BP (mag) | 12.01Ref | IRAS 100μm (Jy) | 1.12Ref | ||
| G (mag) | 11.67Ref | AKARI S09 (Jy) | - | ||
| RP (mag) | 11.15Ref | AKARI S18 (Jy) | 1.82Ref |
| Orbital period (days) | - | γ velocity (km/h) | 24.57±0.81Ref | Size of giant’s orbit (AU) | - |
| Eccentricity | - | RV of giant (km/h) | - | Separation (AU) | - |
| Inclination (°) | - | Inferior conj. of giant (JD) | - | Mass function | - |
| Eclipses | - | Mass ratio | - | ||
| Orbital ephemeris | - |
| Spectral type | G5 IIIRef, F9 IIIRef | Mass (M⊙) | - | Pulsation | - |
| Eff. temperature (K) | 6200±150Ref | Radius (R⊙) | 24.5Ref | Type | - |
| IR type | D'Ref | Luminosity (L⊙) | 1000Ref, 650Ref | Pulsation period (days) | - |
| Metallicity [Fe/H] | 0.07Ref | Pulsation ephemeris | - |
| Type/Spectral type | WDRef | Mass (M⊙) | - | Spin period (min) | - |
| Shell-burning/Accreting-only | shell-burningRef | Radius (R⊙) | 0.016Ref | Accretion disk | - |
| Eff. temperature (K) | 78000Ref | Luminosity (L⊙) | 1000Ref | ||
| Lower limit (K) | - | ||||
| Upper limit (K) | - |
The nature of this object has been a topic of discussion in the literature, with debates on whether it is a planetary nebula or a symbiotic star, see, e.g., Feibelman (1988) and Schwarz (1991). Early observations, such as those of Sanduleak & Stephenson (1972), noted the presence of strong [Ne III] lines. Gutiérrez-Moreno et al. (1995) argued for its classification as a symbiotic system. This symbiotic nature was further supported by spectral analyses (Gutiérrez-Moreno & Moreno, 1996).