Theta1 Orionis A
| Mehrfachstern Theta1 Orionis A | |||||||||||||||||||
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| Sterne des Trapez benannt | |||||||||||||||||||
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| AladinLite | |||||||||||||||||||
| Beobachtungsdaten Äquinoktium: J2000.0, Epoche: J2000.0 | |||||||||||||||||||
| Sternbild | Orion | ||||||||||||||||||
| Rektaszension | 05h 35m 15,83s [1] | ||||||||||||||||||
| Deklination | −05° 23′ 14,2″ [1] | ||||||||||||||||||
| Helligkeiten | |||||||||||||||||||
| Scheinbare Helligkeit | 6,73 (6,72 bis 7,65) mag [1][2] | ||||||||||||||||||
| Spektrum und Indices | |||||||||||||||||||
| Veränderlicher Sterntyp | EA [2] | ||||||||||||||||||
| B−V-Farbindex | (+0,02) [1] | ||||||||||||||||||
| U−B-Farbindex | (−0,88) [1] | ||||||||||||||||||
| R−I-Index | (+0,21) [1] | ||||||||||||||||||
| Spektralklasse | B0.5 V [3] | ||||||||||||||||||
| Astrometrie | |||||||||||||||||||
| Radialgeschwindigkeit | (28 ± 1) km/s [1] | ||||||||||||||||||
| Parallaxe | (2,63 ± 0,10) mas [4] | ||||||||||||||||||
| Entfernung | (1240 ± 50) Lj (380 ± 14) pc | ||||||||||||||||||
| Visuelle Absolute Helligkeit Mvis | (−2,80 ± 0,23) mag [3] | ||||||||||||||||||
| Eigenbewegung [4] | |||||||||||||||||||
| Rek.-Anteil: | (4,81 ± 0,10) mas/a | ||||||||||||||||||
| Dekl.-Anteil: | (−2,53 ± 0,12) mas/a | ||||||||||||||||||
| Physikalische Eigenschaften | |||||||||||||||||||
| Masse | (14,0 ± 0,8) M☉ [3] | ||||||||||||||||||
| Radius | (4,5 ± 0,5) R☉ [3] | ||||||||||||||||||
| Leuchtkraft | |||||||||||||||||||
| Effektive Temperatur | (30700 ± 300) K [3] | ||||||||||||||||||
| Alter | < 2,6 Mio. a [3] | ||||||||||||||||||
| Andere Bezeichnungen und Katalogeinträge | |||||||||||||||||||
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Theta1 Orionis A (θ1 Orionis A, θ1 Ori A, auch 41 Ori A) ist ein Mehrfachsternsystem und ein Mitglied des Trapez im Orionnebel.
Theta1 Orionis A1 ist ein Algolstern mit einem Begleiter in einer Entfernung von etwa 1 AE, der einen Helligkeitseinbruch alle 65 Tage verursacht.[2] Der Begleiter ist wohl ein T-Tauri-Stern mit etwa 2,6 Sonnenmassen.[5] Ein weiterer Begleiter (Theta1 Orionis A2) mit etwa 4 Sonnenmassen befindet sich in etwa 100 AE Entfernung, wodurch das System zu einem Mehrfachstern wird.[6][5] Dieser Stern hat Spektralklasse F und befindet sich noch in der Vorhauptreihenphase. Er umrundet die anderen beiden Sterne etwa alle 200 Jahre.
Weblinks
- Theta-1 Orionis by James B. Kaler.
Einzelnachweise
- ↑ a b c d e f tet01 Ori A. In: SIMBAD. Centre de Données astronomiques de Strasbourg, abgerufen am 14. April 2019.
- ↑ a b c V1016 Ori. In: VSX. AAVSO, abgerufen am 14. April 2019.
- ↑ a b c d e f g María-Fernanda Nieva, Norbert Przybilla: Fundamental properties of nearby single early B-type stars. In: Astronomy & Astrophysics. 566. Jahrgang, 2014, S. A7, doi:10.1051/0004-6361/201423373, arxiv:1412.1418, bibcode:2014A&A...566A...7N.
- ↑ a b Marina Kounkel et al.: The Gould’s Belt Distances Survey (GOBELINS) II. Distances and Structure toward the Orion Molecular Clouds. In: The Astrophysical Journal. 834. Jahrgang, Nr. 2, 2017, doi:10.3847/1538-4357/834/2/142, arxiv:1609.04041, bibcode:2017ApJ...834..142K.
- ↑ a b GRAVITY collaboration: Multiple star systems in the Orion nebula. In: Astronomy & Astrophysics. 620. Jahrgang, 2018, S. A116, doi:10.1051/0004-6361/201833575, arxiv:1809.10376, bibcode:2018A&A...620A.116G.
- ↑ R. Grellmann, T. Preibisch, T. Ratzka, S. Kraus, K. G. Helminiak, H. Zinnecker: The multiplicity of massive stars in the Orion Nebula Cluster as seen with long-baseline interferometry. In: Astronomy & Astrophysics. 550. Jahrgang, 2013, S. A82, doi:10.1051/0004-6361/201220192, arxiv:1301.3045, bibcode:2013A&A...550A..82G.
Auf dieser Seite verwendete Medien
Opaque red circle
Autor/Urheber: IAU and Sky & Telescope magazine (Roger Sinnott & Rick Fienberg), Lizenz: CC BY 3.0
Central bright 'hunting God' between parts of Taurus and Gemini & 5 others. Hourglass form inc. diag. tight belt of 3, so 7 stars of stunning c. 0-1 mag. dominated by blue/white Rigel in SW (of -1. mag). M42, M43 deep-space between mid-leg lines.
Autor/Urheber: Debeo Morium, Lizenz: CC BY-SA 3.0
Orion Nebula - Core Details & Trapezium - Common Names
This is a charted version of a shot i did, the uncharted version is posted here: Orion Nebula Core - Uncharted for comparison, also check out this detailed chart of all the stars: Orion Nebula - Charted. Basically i overlaid all the major stars in the vicinity so you can see the names.s You need to look at it full size though to read the labels. Ill also post below the description from the original:
This is a shot of the Orion Nebula (NGC 1976 / The Great Nebula in Orion / M42) taken on November 12th 2010. This shot also includes a faint wisp of De Mairan's Nebula (NGC 1982 / M43). The shot was taken with an EQ-6 Mount, no Autoguider, and an 800mm focal length, 8" Aperture f/4 Newtonian Telescope using my Canon Rebel T1i as an imager. I used a 3x barlow without an eyepiece. The majority of the shot is the result of 6 stacked 30 second 3200 ISO shots. A stack of 15 additional shots were used on the Trapezium star cluster in the center. This shot was also post-processed to improve contrast and light levels. The primary goal was to show the detail of the inner core of the Orion Nebula.
Taken by Jeffrey Phillips Freeman.