Abell 70
| Emission nebula | |
|---|---|
| Planetary nebula | |
 As seen fromMount Lemmon Observatory | |
| Observation data:J2000epoch | |
| Right ascension | 20h31m33.2s |
| Declination | −07° 05′ 17″ |
| Constellation | Aquila |
| Notable features | A background galaxy gives it a "diamond ring" effect |
| Designations | PK 038-25.1, PN G038.1-25.4 |
Abell 70is a slightly elongatedplanetary nebulalocated 13,500-17,500 light years away in theconstellationofAquila.It is approaching theearthat 79 kilometers per second and expanding 38kilometersper second. There is a galaxy named PMN J2033-0656 behind Abell 70, giving it a "diamond ring" effect.[1]
Composition
[edit]The faint OIII ring structure can be seen through atelescope.[2]The central star of Abell 70 is abinary starsystem consisting of a hotwhite dwarfand a G-typesubgiant star.[3]The subgiant star is abarium star[1]that rotates rapidly (with a period of about 2 days) and is variable due tostarspots.[3]
Background galaxy
[edit]| PMN J2033-0656 | |
|---|---|
| Observation data (J2000epoch) | |
| Right ascension | 20h31m33.1s[4] |
| Declination | −07° 05′ 01″[4] |
| Distance | 253Mly(78Mpc)[5] |
| Characteristics | |
| Apparent size(V) | 1.1' × 0.3'[4] |
| Other designations | |
| 2MASXJ20313312-0705014,6dFGSgJ203133.1-070502,PGC187663,LEDA187663,NVSSJ203133-070522[6] | |
PMN J2033-0656is an edge-onradio galaxy.Its position gives Abell 70 a diamond ring effect at its northern edge.[1]
See also
[edit]References
[edit]- ^abc"Anne's Image of the Day: Planetary Nebula Abell 70".Anne's Astronomy News.30 November 2013.Retrieved17 February2014.
- ^Gottlieb, Steve (16 August 2001)."Best Abell Planetaries: Summer".Astronomy-Mall.Retrieved27 October2018.
- ^abJones, David; Boffin, Henri M J.; Brown, Alex J.; Zak, Jiri; Hume, George; Munday, James; Miszalski, Brent (2022)."A detailed study of the barium central star of the planetary nebula Abell 70".Monthly Notices of the Royal Astronomical Society.516(4): 4833–4843.arXiv:2208.14778.Bibcode:2022MNRAS.516.4833J.doi:10.1093/mnras/stac2501.
- ^abc"Results for 2MASX J20313312-0705014".NASA/IPAC Extragalactic Database.Retrieved25 October2018.
- ^"Astronomical Image Catalog: PNABELL70".ManTrapSkies.com.Retrieved4 October2019.
- ^"PGC 187663".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved25 October2018.
External links
[edit]
Media related toAbell 70at Wikimedia Commons
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