RY Scuti
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Carina |
| Right ascension | 18h 25m 31.48s[1] |
| Declination | −12° 41′ 24.2″[1] |
| Apparent magnitude (V) | 9.12 – 9.72[2] |
| Characteristics | |
| Apparent magnitude (U) | 10.25[3] |
| Apparent magnitude (B) | 10.38±0.99[4] |
| Apparent magnitude (G) | 8.63±0.01[1] |
| Apparent magnitude (R) | 9.46±0.04[4] |
| Apparent magnitude (J) | 6.25±0.02[5] |
| Apparent magnitude (H) | 5.85±0.02[5] |
| Apparent magnitude (K) | 5.46±0.02[5] |
| Variable type | EB/GS[2] |
| Massive Component | |
| Evolutionary stage | Blue supergiant |
| Spectral type | O7[6] |
| Supergiant | |
| Evolutionary stage | Blue supergiant |
| Spectral type | O9.7 Ibpe[7] |
| Astrometry | |
| Proper motion (μ) | RA: −0.333±0.023[1] mas/yr Dec.: −2.026±0.018[1] mas/yr |
| Parallax (π) | 0.4748±0.0220[1] mas |
| Distance | 1800±100[8] pc |
| Massive Component | |
| Absolute bolometric magnitude (Mbol) | −8.3±0.1[6] |
| Supergiant | |
| Absolute bolometric magnitude (Mbol) | −8.7±0.1[6] |
| Orbit | |
| Period (P) | 11.125 d[6] |
| Semi-major axis (a) | 69.9±2.3[7][6]″ |
| Eccentricity (e) | ~0[7] |
| Inclination (i) | 82.4±0.3[6]° |
| Semi-amplitude (K1) (primary) | 59±9[7] km/s |
| Semi-amplitude (K2) (secondary) | 249±3[7] km/s |
| Details | |
| Massive Component | |
| Mass | 30.0±2.1[7][6] M☉ |
| Radius | 9.7±0.2[6] R☉ |
| Luminosity | 160000+20000 −10000[6] L☉ |
| Surface gravity (log g) | 3.94±0.03[6] cgs |
| Temperature | 37000+2000 −1000[6] K |
| Rotational velocity (v sin i) | 194±18[7] km/s |
| Supergiant | |
| Mass | 7.1±1.2[7][6] M☉ |
| Radius | 18.4±0.3[6] R☉ |
| Luminosity | 240000+20000 −20000[6] L☉ |
| Surface gravity (log g) | 2.76±0.02[6] cgs |
| Temperature | 30000+1000 −1000[6] K |
| Rotational velocity (v sin i) | 80±3[7] km/s |
| Other designations | |
RY Sct, HD 169515, ALS 5024, ALS 9603, AN 34.1908, BD-12 5045, CMC 207024, CMC 161458, GCRV 10896, GEN# +1.00169515, GSC 05698-02356, Hen 3-1694, HIP 90303, HIC 90303, IRAS 18227-1243, JP11 2974, LS IV -12 54, LS 5024, MCW 684, PPM 234519, RAFGL 5235S, SAO 161458, SBC7 679, SBC9 1049, HV 3076, TYC 5698-2356-1, UBV M 22925, UCAC2 27342864, UCAC4 387-094010, uvby98 100169515, WEB 15453, YZC 11 6294 | |
| Database references | |
| SIMBAD | data |
RY Scuti is an eclipsing binary in the constellation of Scutum. It consists of a massive central star with an accretion disc and a blue supergiant donor.[6]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 "Gaia DR3 4152599133132654720". vizier.cds.unistra.fr. Retrieved 2026-07-06.
- ↑ 2.0 2.1 "RY Sct". vsx.aavso.org. Retrieved 2026-07-06.
- ↑ Reed, B. Cameron (21 January 2003). "Catalog of Galactic OB Stars". The Astronomical Journal. 125 (5): 2531–2533. Bibcode:2003AJ....125.2531R. doi:10.1086/374771.
- ↑ 4.0 4.1 "UCAC4 387-094010". vizier.cds.unistra.fr. Retrieved 2026-07-06.
- ↑ 5.0 5.1 5.2 "2MASS J18253147-1241241". vizier.cds.unistra.fr. Retrieved 2026-07-06.
- ↑ 6.00 6.01 6.02 6.03 6.04 6.05 6.06 6.07 6.08 6.09 6.10 6.11 6.12 6.13 6.14 6.15 6.16 Djurašević, G.; Vince, I.; Atanacković, O. (8 April 2008). "Accretion Disk in the Massive Binary RY Scuti". The Astronomical Journal. 136 (2): 767–772. Bibcode:2008AJ....136..767D. doi:10.1088/0004-6256/136/2/767.
- ↑ 7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 Grundstorm, Erika D.; Gies, Douglas R.; Hillwig, Todd C.; McSwain, M. Virginia; Smith, Nathan; Gehrz, Robert D.; Stahl, Otmar; Kaufer, Andreas (27 March 2007). "A Spectroscopic Study of Mass Outflows in the Interacting Binary RY Scuti". The Astrophysical Journal. 667 (1): 505–519. arXiv:0706.3206. Bibcode:2007ApJ...667..505G. doi:10.1086/521043.
- ↑ Smith, Nathan; Gehrz, Robert D.; Stahl, Otmar; Balick, Bruce; Kaufer, Andreas (17 June 2002). "The WR+OB Progenitor RY Scuti: Intensive Spectroscopy of Its Compact Double-Ring Nebula". The Astrophysical Journal. 578 (1): 464–485. Bibcode:2002ApJ...578..464S. doi:10.1086/342365.
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