Alterf
(460) L☉[2]
| Stern Alterf (λ Leonis) | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AladinLite | |||||||||||||||||||||
| Beobachtungsdaten Äquinoktium: J2000.0, Epoche: J2000.0 | |||||||||||||||||||||
| Sternbild | Löwe | ||||||||||||||||||||
| Rektaszension | 09h 31m 43,234s [1] | ||||||||||||||||||||
| Deklination | +22° 58′ 04,762″ [1] | ||||||||||||||||||||
| Helligkeiten | |||||||||||||||||||||
| Scheinbare Helligkeit | 4,31 mag[1] | ||||||||||||||||||||
| Spektrum und Indices | |||||||||||||||||||||
| B−V-Farbindex | (1.54)[1] | ||||||||||||||||||||
| U−B-Farbindex | (1.89)[1] | ||||||||||||||||||||
| R−I-Index | (0.90)[1] | ||||||||||||||||||||
| Spektralklasse | K4.5 III[1] | ||||||||||||||||||||
| Astrometrie | |||||||||||||||||||||
| Radialgeschwindigkeit | (24.27 ± 0.19) km/s[1] | ||||||||||||||||||||
| Parallaxe | (10.55 ± 0.56) mas[1] | ||||||||||||||||||||
| Entfernung | (309 ± 20) Lj (95) pc | ||||||||||||||||||||
| Eigenbewegung[1] | |||||||||||||||||||||
| Rek.-Anteil: | (−22.12 ± 0.88) mas/a | ||||||||||||||||||||
| Dekl.-Anteil: | (−38.23 ± 0.57) mas/a | ||||||||||||||||||||
| Physikalische Eigenschaften | |||||||||||||||||||||
| Radius | (46) R☉[2] | ||||||||||||||||||||
| Leuchtkraft | |||||||||||||||||||||
| Effektive Temperatur | (3950) K[2] | ||||||||||||||||||||
| Andere Bezeichnungen und Katalogeinträge | |||||||||||||||||||||
| |||||||||||||||||||||
Alterf (arab. „der Blick“) ist der Eigenname des Sterns λ Leonis (Lambda Leonis). Alterf gehört der Spektralklasse K5 an und besitzt eine scheinbare Helligkeit von +4,3 mag. Alterf ist nach der Messung von Hipparcos ca. 336 Lichtjahre von der Erde entfernt, gemäß Gaia DR2 etwa 310 Lichtjahre.
Einzelnachweise
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