RS Puppis
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Star RS Puppis |
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| Photo from the Hubble Space Telescope | |||||||||||||
| AladinLite | |||||||||||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Aft deck of the ship | ||||||||||||
| Right ascension | 08 h 13 m 4.22 s | ||||||||||||
| declination | -34 ° 34 ′ 42.7 ″ | ||||||||||||
| Apparent brightness | 6.7 (6.52 to 7.67) mag | ||||||||||||
| Typing | |||||||||||||
| B − V color index | (1.30) | ||||||||||||
| U − B color index | (0.89) | ||||||||||||
| Spectral class | F9 to G7 | ||||||||||||
| Variable star type | DCEP | ||||||||||||
| Astrometry | |||||||||||||
| Radial velocity | (24.6 ± 0.5) km / s | ||||||||||||
| parallax | (0.58 ± 0.03) mas | ||||||||||||
| distance | (5600 ± 300) ly (1.700) pc |
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| Proper movement | |||||||||||||
| Rec. Share: | (-3.52 ± 0.04) mas / a | ||||||||||||
| Dec. portion: | (2.82 ± 0.05) mas / a | ||||||||||||
| Physical Properties | |||||||||||||
| Dimensions | 10 M ☉ | ||||||||||||
| radius | 200 R ☉ | ||||||||||||
| Luminosity |
15,000 L ☉ |
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| Effective temperature | (5100) K | ||||||||||||
| Metallicity [Fe / H] | (0.2) | ||||||||||||
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Other names and catalog entries |
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RS Puppis (or RS Pup for short ) is a Cepheid in the constellation Puppis or the aft deck of the ship .
Due to its location in an extensive nebula , scientists with ESO's New Technology Telescope in the La Silla Observatory have succeeded in determining its distance geometrically using the light echo in the nebula. The distance is 6500 ± 90 light years . It is one of the most accurate distance measurements of Cepheids, which is significant because Cepheids are used to determine the distance of objects close to them. More recent parallax measurements of the Gaia satellite , however, indicate a distance of less than 6000 LJ.
Web links
- RS Puppis Light Echoes . Universe Today
- RS Puppis . NASA
Individual evidence
- ↑ a b c d e f g h i j RS Pup. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed September 8, 2018 .
- ↑ a b c RS Pup. In: VSX. AAVSO, accessed September 8, 2018 .
- ↑ Pierre Kervella: Light echoes whisper the distance to a star . European Southern Observatory. February 11, 2008. Retrieved September 9, 2013.
- ↑ Animation of the light echo
- ^ RS Pup Vital Statistics .
- ↑ RS Pup in Gaia DR2. In: VizieR . Center de Données astronomiques de Strasbourg , accessed September 8, 2018 .