Deneb Kaitos
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Star Deneb Kaitos (β Ceti) |
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | whale | ||||||||||||||||||||
| Right ascension | 00 h 43 m 35.37 s | ||||||||||||||||||||
| declination | -17 ° 59 ′ 11.8 ″ | ||||||||||||||||||||
| Apparent brightness | 2.04 mag | ||||||||||||||||||||
| Typing | |||||||||||||||||||||
| B − V color index | +1.02 | ||||||||||||||||||||
| U − B color index | +0.87 | ||||||||||||||||||||
| R − I index | +0.51 | ||||||||||||||||||||
| Spectral class | K0 III | ||||||||||||||||||||
| Variable star type | Yes | ||||||||||||||||||||
| Astrometry | |||||||||||||||||||||
| Radial velocity | (13.1 ± 0.1) km / s | ||||||||||||||||||||
| parallax | (33.86 ± 0.16) mas | ||||||||||||||||||||
| distance | (96.32 ± 0.46) ly (29.53 ± 0.14) pc |
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| Visual absolute brightness M vis | −0.31 mag | ||||||||||||||||||||
| Proper movement | |||||||||||||||||||||
| Rec. Share: | (232.55 ± 0.18) mas / a | ||||||||||||||||||||
| Dec. portion: | (31.99 ± 0.12) mas / a | ||||||||||||||||||||
| Physical Properties | |||||||||||||||||||||
| Dimensions | 3.0 M ☉ | ||||||||||||||||||||
| radius | 17.5 R ☉ | ||||||||||||||||||||
| Luminosity |
145 L ☉ |
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| Effective temperature | ~ 4900 K | ||||||||||||||||||||
| Rotation time | 170 days | ||||||||||||||||||||
| Age | 1 · 10 9 a | ||||||||||||||||||||
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Other names and catalog entries |
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Deneb Kaitos ( Arabic tail of the monster) is the name of the star β Ceti (Beta Ceti ). Deneb Kaitos has an apparent magnitude of 2.04 mag and is therefore (despite its name) brighter than α Ceti and the brightest star in the constellation Whale. He is an orange giant ( Red Clump Star ) of the spectral type K0 at a distance of almost 100 light years (Hipparcos database). Deneb Kaitos is sometimes also called Diphda (frog). Other names: Difda al Thani vonالضفدع الثاني aḍ-ḍafdaʿ aṯ-ṯānī 'the second frog' (“the first frog” is Fomalhaut ), as well as Rana Secunda.
The IAU has the proper name on August 21, 2016 Diphda defined as standardized proper name for this star.
See also
Individual evidence
- ↑ a b c Hipparcos catalog (ESA 1997)
- ↑ a b c Bright Star Catalog
- ↑ Pulkovo radial velocities for 35493 HIP stars
- ↑ a b c Hipparcos, the New Reduction (van Leeuwen, 2007)
- ↑ a b P Cruzalèbes, A Jorissen, Y Rabbia, S Sacuto, A Chiavassa, E Pasquato, B Plez, K Eriksson, A Spang, O Chesneau: Fundamental parameters of 16 late-type stars derived from their angular diameter measured with VLTI / AMBER . In: Monthly Notices of the Royal Astronomical Society . 434, 2013, p. 437. arxiv : 1306.3288 . bibcode : 2013MNRAS.434..437C . doi : 10.1093 / mnras / stt1037 .
- ↑ Deneb Kaitos. Jim Kaler, accessed September 22, 2018 .
- ↑ pray Cet. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed on September 22, 2018 .
- ↑ Bulletin of the IAU Working Group on Star Names, No. October 2, 2016. (PDF) Retrieved November 10, 2016 (English, 151 KiB).