Delta Aurigae
From Wikipedia, the free encyclopedia
 Auriga constellation |
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| Observation data Epoch J2000 Equinox J2000 |
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|---|---|
| Constellation | Auriga |
| Right ascension | 05h 59m 31.6366s |
| Declination | +54° 17′ 04.762″ |
| Apparent magnitude (V) | 3.735 |
| Characteristics | |
| Spectral type | K0III |
| U-B color index | 0.87 |
| B-V color index | 1.0 |
| R-I color index | 0.5 |
| Astrometry | |
| Radial velocity (Rv) | 8.2 km/s |
| Proper motion (μ) | RA: 86.31 mas/yr Dec.: -134.05 mas/yr |
| Parallax (π) | 23.22 ± 0.91 mas |
| Distance | 140 ± 6 ly (43 ± 2 pc) |
| Absolute magnitude (MV) | 4.742 |
| Details | |
| Mass | 0,8 M☉ |
| Radius | 0,9 R☉ |
| Luminosity | 0,4 L☉ |
| Temperature | 3,500–5,000 K |
| Rotation | < 17 Km/s 0,007348 Year |
| Orbit | |
| Companion | CCDM 05595+5418 B |
| Semimajor axis (a) | 115.4" |
| Inclination (i) | 271° |
| Orbit | |
| Companion | CCDM 05595+5418 C |
| Semimajor axis (a) | 197.1" |
| Inclination (i) | 67° |
| Orbit | |
| Companion | CCDM 05595+5418 D |
| Semimajor axis (a) | 93.5" |
| Inclination (i) | 111° |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
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| Database references | |
| SIMBAD | data |
Delta Aurigae (δ Aur / δ Aurigae) is a star system in the constellation Auriga. It is approximately 140 light-years from Earth.
The primary component, δ Aurigae A, is an orange K-type giant with an apparent magnitude of +3.72. It has three companions; δ Aurigae B, with an apparent magnitude of +9.7, is 115.4 arcseconds distant. at 197.1 arcseconds from A, is δ Aurigae C, which also has an apparent magnitude of +9.7. C is itself a binary, and its 11th magnitude companion lies 93.5 arcseconds away from it.
It has the traditional Sanskrit name Prijipati, from प्रजापति prajā pati "Lord of Creation.
[edit] Components
| NAME | Right ascension | Declination | Apparent magnitude (V) | Spectral type | Database references |
|---|---|---|---|---|---|
| IDS 05512+5416 B (BD+54 970B) | 05<up>h 59m 29.4s | +54° 17' 11 | 9.7 | Simbad | |
| IDS 05512+5416 C (NSV 2747) | 05h 59m 51.519s | +54° 18' 31.38 | 10.5 | A0 | Simbad |
| IDS 05512+5416 D (CCDM J05595+5418P) | 05h 59m 51.2s | +54° 17' 14 | 11.0 | Simbad |
[edit] References
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