Aladfar
| Stern Aladfar (η Lyrae) | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AladinLite | |||||||||||||||||||||
| Beobachtungsdaten Äquinoktium: J2000.0, Epoche: J2000.0 | |||||||||||||||||||||
| Sternbild | Leier | ||||||||||||||||||||
| Rektaszension | 19h 13m 45,487s [1] | ||||||||||||||||||||
| Deklination | +39° 08′ 45,432″ [1] | ||||||||||||||||||||
| Helligkeiten | |||||||||||||||||||||
| Scheinbare Helligkeit | 4,40 mag[1] | ||||||||||||||||||||
| Spektrum und Indices | |||||||||||||||||||||
| Veränderlicher Sterntyp | ja | ||||||||||||||||||||
| B−V-Farbindex | −0.15[2] | ||||||||||||||||||||
| U−B-Farbindex | −0.65[2] | ||||||||||||||||||||
| R−I-Index | −0,15[2] | ||||||||||||||||||||
| Spektralklasse | B2.5 IV[1] | ||||||||||||||||||||
| Astrometrie | |||||||||||||||||||||
| Radialgeschwindigkeit | (−8.1 ± 0.9) km/s[1] | ||||||||||||||||||||
| Parallaxe | (2.9107 ± 0.1125) mas[3] | ||||||||||||||||||||
| Entfernung | (1120 ± 45) Lj (344 ± 14) pc [3] | ||||||||||||||||||||
| Eigenbewegung[3] | |||||||||||||||||||||
| Rek.-Anteil: | (−1.476 ± 0.142) mas/a | ||||||||||||||||||||
| Dekl.-Anteil: | (−1.393 ± 0.134) mas/a | ||||||||||||||||||||
| Physikalische Eigenschaften | |||||||||||||||||||||
| Andere Bezeichnungen und Katalogeinträge | |||||||||||||||||||||
| |||||||||||||||||||||
Aladfar ist die Bezeichnung des Sterns η Lyrae (Eta Lyrae). Aladfar gehört der Spektralklasse B2.5IV an und besitzt eine scheinbare Helligkeit von +4,39 mag. Er befindet sich in einer Entfernung von ca. 1120 Lichtjahren. Der Name (arabisch) bedeutet „Krallen (eines herabstoßenden Adlers)“. Aladfar ist wohl ein spektroskopischer Doppelstern.
Weblinks
- Aladfar auf: Stars von Jim Kaler
Einzelnachweise
- ↑ a b c d eta Lyr. In: SIMBAD. Centre de Données astronomiques de Strasbourg, abgerufen am 14. September 2018.
- ↑ a b c Eintrag für Aladfar im Bright Star Catalogue, 5. Auflage, 1991.
- ↑ a b c Gaia data release 3 (Gaia DR3) für Aladfar, Juni 2022.
Content Disclaimer
Informasi ini disarikan dari Wikipedia dan disajikan kembali untuk tujuan edukasi. Konten tersedia di bawah lisensi CC BY-SA 3.0. Kami tidak bertanggung jawab atas ketidakakuratan data yang bersumber dari kontribusi publik tersebut.
- The information displayed on this website is sourced in part or in whole from Wikipedia and has been adapted for the purpose of restating it. We strive to provide accurate and relevant information, however:
- There is no guarantee of absolute accuracy. Wikipedia is an open, collaborative project that can be edited by anyone, so information is subject to change.
- It is not intended to constitute professional advice. The content displayed is for informational and educational purposes only. For important decisions (e.g., medical, legal, or financial), please consult a professional.
- Content copyright. Wikipedia is licensed under the Creative Commons Attribution-ShareAlike License (CC BY-SA). This means that content may be reused with appropriate attribution and shared under a similar license.
- Responsible use. Any risk arising from the use of information from this website is entirely the responsibility of the user.