7 Eridani

7 Eridani
Observationsdata
Epok: J2000.0
StjärnbildEridanus
Rektascension03t 00m 50,88s
Deklination-02° 52′ 43,04″[1]
Skenbar magnitud ()5,55 (V)[2]
Stjärntyp
SpektraltypM0/1III[1]
B–V1,771±0,030[3]
VariabeltypLångsam irreguljär variabel (LB:)[2]
Astrometri
Radialhastighet ()81,84±0,49 km/s
Egenrörelse (µ)RA: 7,900±0,236 mas/år
Dek.: 8,094±0,196 mas/år
Parallax ()3,0136±0,1212 mas
Avstånd832,05[4] lå (255,10[4] pc)
Absolut magnitud ()-0,92[4]
Detaljer
Radie45,44[4] R☉
Temperatur3 234 K
Andra beteckningar
DO 497[5], GCRV 1679[5], GSC 04710-01257[5], HD 18760[5], HIC 14040[5], HIP 14040[5], HR 904[5], IRAS 02583-0304[5], IRC +00037[5], 2MASS J03005088-0252430[5], PPM 185291[5], RAFGL 413[5], SAO 130242[5], UBV 2922[5], YZ 93 725[5], 7 Eri, Gaia DR3 5186378382371856128[5], RAVE J030050.9-025243[5], TIC 439903801[5], AAVSO 0255-03[5], GC 3621[5], TYC 4710-1257-1[5], UBV M 9282[5], CV Eri[5], Gaia DR1 5186378378076503040[5], WEB 2766[5] och Gaia DR2 5186378382371856128[5]

7 Eridani, eller CV Eridani, är en misstänkt långsam irreguljär variabel av LB-typ (LB:)[2] i stjärnbilden Eridanus.

Stjärnan har visuell magnitud +5,55 utan någon fastställd amplitud eller periodicitet.[2] Den befinner sig på ett avstånd av ungefär 830 ljusår.[4]

Se även

Referenser

  1. ^ [a b] ”Basic data: V* 7 Eri – Long Period Variable candidate” (på engelska). Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=7+Eri&submit=SIMBAD+search. Läst 11 juni 2020. 
  2. ^ [a b c d] ”NSV 1008” (på engelska). The International Variable Star Index. AAVSO – American Association of Variable Star Observers. http://www.aavso.org/vsx/index.php?view=detail.top&oid=39632. Läst 11 juni 2020. 
  3. ^ van Leeuwen (2007). ”Hipparcos, the New Reduction” (på engelska). http://vizier.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&HIP=14040. Läst 11 juni 2020. 
  4. ^ [a b c d e] ”7 Eridani” (på engelska). Universe Guide. https://www.universeguide.com/star/7eridani. Läst 11 juni 2020. 
  5. ^ [a b c d e f g h i j k l m n o p q r s t u v w x y z] SIMBAD Astronomical Database.[källa från Wikidata]
v • r
Stjärnor i Eridanus
Bayer
Flamsteed
Variabler
HD
Övriga

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