CONFIRMED
MILKY WAY
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| FG Ser | IRAS 18125-0019 | GSC2.4.2 S9HL000359 | AAVSO 000-BCB-736 |
| SIMBAD V* FG Ser | Pan-STARRS 107622737796022941 | SAO - | VSX 34762 |
| GAIA DR3 4274771986126496640 | SkyMapper 181507.11-001852.2 | WRAY - | GCVS FG Ser |
| 2MASS J18150712-0018523 | HIP - | Hen - | BD - |
| WISE J181507.09-001852.1 | TYC 5098-731-1 | ESO - | HD - |
| Bidelman (1954) | - | Allen (1984) | AS 296 (Conf.) | Belzcyński et al. (2001) | FG Ser (Conf.) |
| Gaposchkin (1957) | - | Kenyon (1986) | AS 296 (Conf.) | Akras et al. (2019) | FG Ser (Conf.) |
| Boyarchuk (1969) | - | Vaidis (1988, 1991) | VDS 134 (Conf.) |
| Right ascension (°) | 273.7796Ref | Parallax (mas) | 0.625±0.046Ref | Reddening E(B-V) (mag) | 0.72±0.02Ref, Note |
| Declination (°) | -0.3145Ref | Distance (kpc) | 1.8Ref, 0.93Ref, 1.1Ref, 1.14Ref 1.47Ref, Note, 1.44Ref, Note |
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| Galactic longitude (°) | 28.4821Ref | Proper motion in α (mas/yr) | 4.05±0.04Ref | ||
| Galactic latitude (°) | 7.9289Ref | Proper motion in δ (mas/yr) | -2.97±0.04Ref |
| X-Ray | NoRef | IR type | SRef | Radio | YesRef |
| X-Ray type | - | J (mag) | 5.91Ref | Flickering | NoRef |
| GALEX FUV (mag) | 17.57Ref | H (mag) | 4.87Ref | Outbursts | YesRef |
| GALEX NUV (mag) | 18.10Ref | K (mag) | 4.40Ref | Outburst type | Z AndRef |
| IUE | NoRef | WISE W1 (mag) | 4.27Ref | Jets | - |
| FUSE | NoRef | WISE W2 (mag) | 4.00Ref | Resolved nebula | NoRef |
| U (mag) | - | WISE W3 (mag) | 3.96Ref | IPmax (eV) | 99Ref |
| B (mag) | 14.08Ref | WISE W4 (mag) | 3.54Ref | [O III] lines | YesRef |
| V (mag) | 12.24Ref | IRAS 12μm (Jy) | 1.00Ref | He II lines | YesRef |
| R (mag) | - | IRAS 25μm (Jy) | 0.42Ref | [Fe VII] lines | YesRef |
| I (mag) | - | IRAS 60μm (Jy) | 0.40Ref | O VI lines | NoRef |
| BP (mag) | 11.91Ref | IRAS 100μm (Jy) | 2.74Ref | ||
| G (mag) | 9.74Ref | AKARI S09 (Jy) | 1.29Ref | ||
| RP (mag) | 8.39Ref | AKARI S18 (Jy) | 0.45Ref |
| Orbital period (days) | 650±10Ref, 650±5Ref, 633.5±2.4Ref, 649±36Ref |
γ velocity (km/h) | 71.2±0.2Ref, 73.32±0.16Ref, -22.95±21.22Ref |
Size of giant’s orbit (AU) | 0.497Ref |
| Eccentricity | 0±0.2Ref, 0Ref | RV of giant (km/h) | 8.3±0.2Ref, 6.92±0.26Ref | Separation (AU) | 1.95Ref |
| Inclination (°) | - | Inferior conj. of giant (JD) | 2448491 | Mass function | 0.039Ref |
| Eclipses | YesRef | Mass ratio | 2.8Ref | ||
| Orbital ephemeris | Min (V) = 2448492 ±4 + 650±10 x ERef, Min (V) = 2451665 + 649±36 x ERef |
| Spectral type | M5 IIIRef, M5.3 IIIRef, M3.5 IIIRef |
Mass (M⊙) | 1.7±0.7Ref | Pulsation | YesRef |
| Eff. temperature (K) | 3470±100Ref | Radius (R⊙) | 105±15Ref | Type | SRRef |
| IR type | SRef | Luminosity (L⊙) | 1440±600Ref | Pulsation period (days) | 50±1Ref |
| Metallicity [Fe/H] | -0.08±0.06Ref | Pulsation ephemeris | - |
| Type/Spectral type | WDRef | Mass (M⊙) | 0.6±0.15Ref | Spin period (min) | - |
| Shell-burning/Accreting-only | shell-burningRef | Radius (R⊙) | 0.064-0.086Ref | Accretion disk | - |
| Eff. temperature (K) | 100000-150000Ref | Luminosity (L⊙) | 750-2100Ref | ||
| Lower limit (K) | - | ||||
| Upper limit (K) | - |