CONFIRMED
MILKY WAY
|
| V694 Mon | IRAS 07233-0737 | GSC2.4.2 S3UE001085 | AAVSO 000-BBN-085 |
| SIMBAD EM* MWC 560 | Pan-STARRS 98711114636527656 | SAO - | VSX 19522 |
| GAIA DR3 3054628264738851456 | SkyMapper 072551.29-074408.1 | WRAY - | GCVS V0694 Mon |
| 2MASS J07255128-0744080 | HIP - | Hen - | BD - |
| WISE J072551.27-074408.2 | TYC 5396-1135-1 | ESO - | HD - |
| Bidelman (1954) | - | Allen (1984) | - | Belzcyński et al. (2001) | V694 Mon (Conf.) |
| Gaposchkin (1957) | - | Kenyon (1986) | - | Akras et al. (2019) | V694 Mon (Conf.) |
| Boyarchuk (1969) | - | Vaidis (1988, 1991) | MWC 560 (Conf.) |
| Right ascension (°) | 111.4637Ref | Parallax (mas) | 0.424±0.035Ref | Reddening E(B-V) (mag) | 0.22±0.01Ref, Note |
| Declination (°) | -7.7356Ref | Distance (kpc) | 2.5±0.3Ref 2.22Ref, Note, 2.17Ref, Note |
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| Galactic longitude (°) | 223.7598Ref | Proper motion in α (mas/yr) | 2.07±0.03Ref | ||
| Galactic latitude (°) | 4.0462Ref | Proper motion in δ (mas/yr) | 0.55±0.03Ref |
| X-Ray | YesRef | IR type | SRef | Radio | NoRef |
| X-Ray type | β/δRef | J (mag) | 6.45Ref | Flickering | YesRef |
| GALEX FUV (mag) | - | H (mag) | 5.47Ref | Outbursts | YesRef |
| GALEX NUV (mag) | - | K (mag) | 5.07Ref | Outburst type | Z And?Ref |
| IUE | YesRef | WISE W1 (mag) | 4.74Ref | Jets | YesRef |
| FUSE | YesRef | WISE W2 (mag) | 4.31Ref | Resolved nebula | - |
| U (mag) | - | WISE W3 (mag) | 4.08Ref | IPmax (eV) | 24.6Ref |
| B (mag) | 10.39Ref | WISE W4 (mag) | 3.95Ref | [O III] lines | NoRef |
| V (mag) | 10.31Ref | IRAS 12μm (Jy) | 0.85Ref | He II lines | NoRef |
| R (mag) | 10.60Ref | IRAS 25μm (Jy) | 0.36Ref | [Fe VII] lines | NoRef |
| I (mag) | - | IRAS 60μm (Jy) | 0.40Ref | O VI lines | NoRef |
| BP (mag) | 10.44Ref | IRAS 100μm (Jy) | 1.13Ref | ||
| G (mag) | 9.56Ref | AKARI S09 (Jy) | 0.98Ref | ||
| RP (mag) | 8.55Ref | AKARI S18 (Jy) | 0.26Ref |
| Orbital period (days) | 1930Ref | γ velocity (km/h) | - | Size of giant’s orbit (AU) | - |
| Eccentricity | 0.68-0.82±nanRef | RV of giant (km/h) | - | Separation (AU) | 3.35Ref |
| Inclination (°) | 13±1Ref | Inferior conj. of giant (JD) | - | Mass function | - |
| Eclipses | NoRef | Mass ratio | 1.1Note | ||
| Orbital ephemeris | Min (B) = 2437455 + 1930 x ERef |
| Spectral type | M5-6 IIIRef, M6 IIIRef, M6 IIIRef |
Mass (M⊙) | 1Ref | Pulsation | YesRef |
| Eff. temperature (K) | 3300Ref | Radius (R⊙) | 195Ref | Type | SRRef |
| IR type | SRef | Luminosity (L⊙) | - | Pulsation period (days) | 339Ref, 332±8Ref |
| Metallicity [Fe/H] | -0.35±0.08Ref | Pulsation ephemeris | Max (V) = 2445960 + 339 x ERef |
| Type/Spectral type | WDRef | Mass (M⊙) | 0.9Ref | Spin period (min) | - |
| Shell-burning/Accreting-only | accreting-onlyRef | Radius (R⊙) | - | Accretion disk | YesRef |
| Eff. temperature (K) | - | Luminosity (L⊙) | 100Ref | ||
| Lower limit (K) | - | ||||
| Upper limit (K) | - |
Classified as M4ep in Sanduleak & Stephenson (1973). Allen (1978) reported strong Hα and Hβ emission. In Bond et al. (1984), significant flickering and blue-shifted absorption features were noted. The object was classified as a symbiotic-like binary consisting of an M giant and a compact companion. An outburst of the system was reported by Feast & Marang (1990). Subsequently, Maran et al. (1990) reported the emergence of the nova-like spectrum. In Luthardt (1991), the long-term historical light curve of the object was presented, showing at least two other outbursts in the past. The system is known to exhibit jets, as reported in Schmid et al. (2001) and references therein. Another strong outburst of the system was detected by Munari et al. (2016) and analyzed by Munari et al. (2016), and Lucy et al. (2020). Another active stage is discussed by Kondratyeva et al. (2021), Goranskij et al. (2021), Munari & Dallaporta (2021), and Ando et al. (2021).