CONFIRMED
MILKY WAY
|
| V745 Sco | IRAS - | GSC2.4.2 S8GW137263 | AAVSO 000-BBZ-700 |
| SIMBAD V* V745 Sco | Pan-STARRS - | SAO - | VSX 33561 |
| GAIA DR3 4043221606260719360 | SkyMapper - | WRAY - | GCVS V0745 Sco |
| 2MASS J17552222-3314585 | HIP - | Hen - | BD - |
| WISE J175522.22-331458.6 | TYC - | ESO - | HD - |
| Bidelman (1954) | - | Allen (1984) | - | Belzcyński et al. (2001) | V745 Sco (Conf.) |
| Gaposchkin (1957) | - | Kenyon (1986) | - | Akras et al. (2019) | V745 Sco (Conf.) |
| Boyarchuk (1969) | - | Vaidis (1988, 1991) | - |
| Right ascension (°) | 268.8426Ref | Parallax (mas) | 0.100±0.076Ref | Reddening E(B-V) (mag) | 0.71±0.02Ref, Note |
| Declination (°) | -33.2496Ref | Distance (kpc) | 4.6Ref 5.88Ref, Note, 6.59Ref, Note |
||
| Galactic longitude (°) | 357.3583Ref | Proper motion in α (mas/yr) | -1.93±0.07Ref | ||
| Galactic latitude (°) | -3.9989Ref | Proper motion in δ (mas/yr) | -9.34±0.05Ref |
| X-Ray | YesRef | IR type | SRef | Radio | YesRef |
| X-Ray type | βRef | J (mag) | 10.04Ref | Flickering | - |
| GALEX FUV (mag) | - | H (mag) | 8.85Ref | Outbursts | YesRef |
| GALEX NUV (mag) | - | K (mag) | 8.26Ref | Outburst type | SyRNRef |
| IUE | YesRef | WISE W1 (mag) | 7.42Ref | Jets | - |
| FUSE | NoRef | WISE W2 (mag) | 7.09Ref | Resolved nebula | - |
| U (mag) | - | WISE W3 (mag) | 5.87Ref | IPmax (eV) | 262Ref, 35.1Ref |
| B (mag) | - | WISE W4 (mag) | 5.27Ref | [O III] lines | YesRef |
| V (mag) | 17.99Ref | IRAS 12μm (Jy) | - | He II lines | NoRef |
| R (mag) | - | IRAS 25μm (Jy) | - | [Fe VII] lines | YesRef, NoRef |
| I (mag) | 13.35Ref | IRAS 60μm (Jy) | - | O VI lines | YesRef, NoRef |
| BP (mag) | 16.54Ref | IRAS 100μm (Jy) | - | ||
| G (mag) | 14.62Ref | AKARI S09 (Jy) | 0.20Ref | ||
| RP (mag) | 13.25Ref | AKARI S18 (Jy) | - |
| Orbital period (days) | 510±20Ref | 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 | 0.72Note | ||
| Orbital ephemeris | - |
| Spectral type | M6 IIIRef, M4-5 IIIRef | Mass (M⊙) | 1Ref | Pulsation | YesRef |
| Eff. temperature (K) | - | Radius (R⊙) | - | Type | - |
| IR type | SRef | Luminosity (L⊙) | - | Pulsation period (days) | 136.5±1Ref, 77.4±1Ref |
| Metallicity [Fe/H] | - | Pulsation ephemeris | - |
| Type/Spectral type | WDRef | Mass (M⊙) | 1.2Ref, 1.385Ref | Spin period (min) | - |
| Shell-burning/Accreting-only | shell-burningRef | Radius (R⊙) | - | Accretion disk | - |
| Eff. temperature (K) | - | Luminosity (L⊙) | 25Ref | ||
| Lower limit (K) | - | ||||
| Upper limit (K) | - |
The system experienced several outbursts, with the 1937 event documented on Harvard plates (Plaut, 1958). The light curve of the first outburst is illustrated in Duerbeck (1984). Detection of the second outburst was reported in Liller (1989), and its optical and infrared light curves are presented in Sekiguchi et al. (1990). The spectrum of this system resembles that of T CrB, as mentioned in Wagner et al. (1989). The detection of O VI lines and forbidden Fe VII, Fe X, and Fe XI was reported in Duerbeck et al. (1989). A subsequent outburst in 2014 was documented in Waagen (2014), with X-ray and γ-ray emissions reported in Mukai et al. (2014), Page et al. (2014), and Cheung et al. (2014). The system's possible orbital period of 510 days, suggested in Schaefer (2009), was later disputed by Mróz et al. (2014). Detailed discussion on the X-ray emission was presented in Orio et al. (2015) and Page et al. (2015), while radio emission was explored by Kantharia et al. (2016).