CONFIRMED
MILKY WAY
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| H 1-45 | IRAS 17552-2814 | GSC2.4.2 S8DG065645 | AAVSO 000-BLH-121 |
| SIMBAD PN H 1-45 | Pan-STARRS 74102695911092899 | SAO - | VSX 303662 |
| GAIA DR3 4062646712567004416 | SkyMapper - | WRAY 16-340 | GCVS - |
| 2MASS J17582187-2814522 | HIP - | Hen 2-317 | BD - |
| WISE J175821.90-281452.7 | TYC - | ESO 456-27 | HD - |
| Bidelman (1954) | - | Allen (1984) | - | Belzcyński et al. (2001) | - |
| Gaposchkin (1957) | - | Kenyon (1986) | - | Akras et al. (2019) | H 1-45 (Conf.) |
| Boyarchuk (1969) | - | Vaidis (1988, 1991) | - |
| Right ascension (°) | 269.5911Ref | Parallax (mas) | 0.948±0.236Ref | Reddening E(B-V) (mag) | 1.21±0.09Ref, Note |
| Declination (°) | -28.2478Ref | Distance (kpc) | 6.2Ref 1.77Ref, Note, 3.92Ref, Note |
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| Galactic longitude (°) | 2.0186Ref | Proper motion in α (mas/yr) | -5.11±0.24Ref | ||
| Galactic latitude (°) | -2.0558Ref | Proper motion in δ (mas/yr) | -3.33±0.16Ref |
| X-Ray | NoRef | IR type | DRef | Radio | YesRef |
| X-Ray type | - | J (mag) | 10.52Ref | Flickering | - |
| GALEX FUV (mag) | - | H (mag) | 8.40Ref | Outbursts | - |
| GALEX NUV (mag) | - | K (mag) | 6.70Ref | Outburst type | - |
| IUE | NoRef | WISE W1 (mag) | 3.96Ref | Jets | - |
| FUSE | NoRef | WISE W2 (mag) | 3.27Ref | Resolved nebula | - |
| U (mag) | - | WISE W3 (mag) | 2.18Ref | IPmax (eV) | 99Ref |
| B (mag) | 18.00Ref | WISE W4 (mag) | 1.64Ref | [O III] lines | YesRef |
| V (mag) | 15.60Ref | IRAS 12μm (Jy) | 7.96Ref | He II lines | YesRef |
| R (mag) | 14.80Ref | IRAS 25μm (Jy) | 3.59Ref | [Fe VII] lines | YesRef |
| I (mag) | 12.49Ref | IRAS 60μm (Jy) | 4.45Ref | O VI lines | NoRef |
| BP (mag) | 15.91Ref | IRAS 100μm (Jy) | 24.70Ref | ||
| G (mag) | 14.35Ref | AKARI S09 (Jy) | 5.23Ref | ||
| RP (mag) | 12.93Ref | AKARI S18 (Jy) | 2.44Ref |
| Orbital period (days) | - | γ velocity (km/h) | - | 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 | C4-7Ref | Mass (M⊙) | - | Pulsation | YesRef |
| Eff. temperature (K) | - | Radius (R⊙) | - | Type | MiraRef |
| IR type | DRef | Luminosity (L⊙) | - | Pulsation period (days) | 408.6Ref |
| Metallicity [Fe/H] | - | Pulsation ephemeris | Min(I) = 2453551 + 408.6 x ERef |
| Type/Spectral type | - | Mass (M⊙) | - | Spin period (min) | - |
| Shell-burning/Accreting-only | shell-burningRef | Radius (R⊙) | - | Accretion disk | - |
| Eff. temperature (K) | - | Luminosity (L⊙) | - | ||
| Lower limit (K) | 100000Ref | ||||
| Upper limit (K) | - |
The spectrum of H1-45 exhibits prominent emission lines typical of D-type symbiotic stars, accompanied by a red continuum with strong CN bands and prominent Ba II absorption lines at λλ 4554, 4934, and 6495. These spectral characteristics indicate the presence of a cool carbon star enriched in s-process elements. H1-45 stands out due to the discovery of a 408.6-day pulsation period revealed by the OGLE light curve, categorizing it as the fourth known carbon-rich symbiotic Mira (Miszalski et al., 2013).