SUSPECTED
MILKY WAY
|
| PN K4-4 | IRAS - | GSC2.4.2 N1QG051724 | AAVSO - |
| SIMBAD PN K 4-4 | Pan-STARRS 116132810437428826 | SAO - | VSX - |
| GAIA DR3 4285721541395643776 | SkyMapper - | WRAY - | GCVS - |
| 2MASS J18441049+0646550 | HIP - | Hen - | BD - |
| WISE J184410.49+064655.0 | TYC - | ESO - | HD - |
| Bidelman (1954) | - | Allen (1984) | - | Belzcyński et al. (2001) | - |
| Gaposchkin (1957) | - | Kenyon (1986) | - | Akras et al. (2019) | - |
| Boyarchuk (1969) | - | Vaidis (1988, 1991) | - |
| Right ascension (°) | 281.0437Ref | Parallax (mas) | 0.152±0.056Ref | Reddening E(B-V) (mag) | 1.11±0.06Ref, Note |
| Declination (°) | 6.7820Ref | Distance (kpc) | 4.54Ref, Note, 4.92Ref, Note | ||
| Galactic longitude (°) | 38.1564Ref | Proper motion in α (mas/yr) | -2.75±0.06Ref | ||
| Galactic latitude (°) | 4.6949Ref | Proper motion in δ (mas/yr) | -5.13±0.05Ref |
| X-Ray | - | IR type | S?Ref | Radio | - |
| X-Ray type | - | J (mag) | 10.29Ref | Flickering | - |
| GALEX FUV (mag) | - | H (mag) | 9.08Ref | Outbursts | - |
| GALEX NUV (mag) | - | K (mag) | 8.57Ref | Outburst type | - |
| IUE | NoRef | WISE W1 (mag) | 8.34Ref | Jets | - |
| FUSE | NoRef | WISE W2 (mag) | 8.48Ref | Resolved nebula | - |
| U (mag) | - | WISE W3 (mag) | 8.21Ref | IPmax (eV) | - |
| B (mag) | - | WISE W4 (mag) | 7.99Ref | [O III] lines | - |
| V (mag) | 10.37Ref | IRAS 12μm (Jy) | - | He II lines | - |
| R (mag) | - | IRAS 25μm (Jy) | - | [Fe VII] lines | - |
| I (mag) | - | IRAS 60μm (Jy) | - | O VI lines | - |
| BP (mag) | 17.67Ref | IRAS 100μm (Jy) | - | ||
| G (mag) | 14.65Ref | AKARI S09 (Jy) | - | ||
| RP (mag) | 13.18Ref | AKARI S18 (Jy) | - |
| Orbital period (days) | - | γ velocity (km/h) | 49.00±1.39Ref | 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 | - | Mass (M⊙) | - | Pulsation | - |
| Eff. temperature (K) | - | Radius (R⊙) | - | Type | - |
| IR type | S?Ref | Luminosity (L⊙) | - | Pulsation period (days) | - |
| Metallicity [Fe/H] | - | Pulsation ephemeris | - |
| Type/Spectral type | - | Mass (M⊙) | - | Spin period (min) | - |
| Shell-burning/Accreting-only | - | Radius (R⊙) | - | Accretion disk | - |
| Eff. temperature (K) | - | Luminosity (L⊙) | - | ||
| Lower limit (K) | - | ||||
| Upper limit (K) | - |
In Allen (1974), the object was classified as a compact PN resembling a late-type star, designated as class S. The author also asserted that most objects in this class are either symbiotics or VV Cephei-type stars. In Acker et al. (1987), no emission lines were reported for this object.