Astronomy:Sh 2-78
From HandWiki
| Emission nebula | |
|---|---|
| H II region | |
| Observation data: epoch | |
| Right ascension | 19h 03m 08s |
| Declination | +14° 06′ 58″[1] |
| Distance | 2170 ly |
| Apparent magnitude (V) | 14.0 |
| Apparent diameter | 27'[2] |
| Constellation | Aquila |
| Physical characteristics | |
| Radius | 7.6[3] ly |
| Designations | PN G046.8+03.8 |
Sh 2-78 is a planetary nebula in Aquila.[4]
It was discovered by Stewart Sharpless while assembling his catalogue, and identified as a planetary nebula in 1990. It has a central star with a magnitude of 17.[5] The central star is a variable star, with a variability of 0.3 in magnitude.[6]
References
- ↑ "sh 2-78 Search". https://www.deepskycorner.ch/search.en.php?search=sh+2-78.
- ↑ Mohery, M.; Ali, A.; Mindil, A.; Alghamdi, S.A.. "Interacting planetary nebulae III: Verification and galactic population based on the measurements of Gaia EDR3". https://arxiv.org/pdf/2206.05638.
- ↑ "Astrobasics Sharpless (Sh2)". https://astrobasics.de/galerie/kataloge/sh2/#object-10481.
- ↑ Cappellaro, Enrico; Turatto, Massimo; Salvadori, L.; Sabbadin, Federico. "Four newly identifield planetary nebulae in the Palomar plate 18h48m +12.". https://ui.adsabs.harvard.edu/abs/1990A%26AS...86..503C/abstract.
- ↑ Acker, A.; Ochsenbein, F.; Stenholm, B.; Tylenda, R.; Marcout, J.; Schohn, C.. "Strasbourg-ESO Catalogue of Galactic Planetary Nebulae (1992)". http://cdsarc.unistra.fr/viz-bin/cat/V/84.
- ↑ De Marco, Orsola; Passy, Jean-Claude; Frew, D.J.; Maxwell, Moe; Jacoby, G.H.. "The binary fraction of planetary nebula central stars – I. A high-precision, I-band excess search". https://academic.oup.com/mnras/article/428/3/2118/1063692.
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