Ear Nebula

IPHASX J205013.6+465515
Nebula
Planetary Nebula
Image of Ear Nebula
Observation data: epoch
Right ascension20h 50m 13.00s[1]
Declination+46° 55′ 18.0″[1]
ConstellationCygnus
DesignationsIPHASX J205013.6+465515, PN G086.5+01.8, Ear Nebula, Ra 10[1]
See also: Lists of nebulae

IPHASX J205013.6+465515, informally known as the Ear Nebula, is a faint bipolar planetary nebula located in the constellation of Cygnus. It was discovered in 2005 during the INT Photometric Hα Survey (IPHAS) and is classified as a relatively evolved object with low surface brightness, making it challenging to observe without specialized equipment.[2][3][4][5][6]

Charecterstics

It is surrounded by a faint, irregular shell, which may represent an asymptotic giant branch (AGB) remnant and the central star might be a white dwarf or an early multiple-shell structure. This shell suggests minimal distortion in the main nebula, classifying it as a WZO1-type planetary nebula-interstellar medium (PN-ISM) interaction candidate, where the central structure remains largely unaffected, possibly with a distant bow shock.[3][4][7][8]

References

  1. ^ a b c "Simbad - Object view". simbad.cds.unistra.fr. Retrieved 2025-12-19.
  2. ^ [email protected]. "IPHASX J205013.7+465518, the Ear Nebula". www.noirlab.edu. Retrieved 2025-12-19.
  3. ^ a b Sabin, Laurence; Zijlstra, Albert A.; Wareing, Christopher; Corradi, Romano L. M.; Mampaso, Antonio; Viironen, Kerttu; Wright, Nicholas J.; Parker, Quentin A. (2009-12-30), "New Candidate Planetary Nebulae in the IPHAS Survey: The Case of Planetary Nebulae with ISM interaction", Publications of the Astronomical Society of Australia, 27 (2): 166–173, arXiv:1001.0027, doi:10.1071/AS09046
  4. ^ a b Sabin, L.; Parker, Q. A.; Corradi, R. L. M; Guzman-Ramirez, L.; Morris, R. A. H.; Zijlstra, A. A.; Bojičić, I. S.; Frew, D. J.; Guerrero, M.; Stupar, M.; Barlow, M. J.; Mora, F. Cortés; Drew, J. E.; Greimel, R.; Groot, P. (2014-10-01). "First release of the IPHAS catalogue of new extended planetary nebulae". Monthly Notices of the Royal Astronomical Society. 443 (4): 3388–3401. arXiv:1407.0109. doi:10.1093/mnras/stu1404. ISSN 1365-2966.
  5. ^ "Planetary Nebulae". planetarynebulae.net. Retrieved 2025-12-19.
  6. ^ "Hanson Astrophotography-Planetary Nebula". Hanson Astrophotography. Retrieved 2025-12-19.
  7. ^ Sabin, L; Guerrero, M A; Ramos-Larios, G; Boumis, P; Zijlstra, A A; Awang Iskandar, D N F; Barlow, M J; Toalá, J A; Parker, Q A; Corradi, R M L; Morris, R A H (2021-10-06). "First deep images catalogue of extended IPHAS PNe". Monthly Notices of the Royal Astronomical Society. 508 (2): 1599–1617. arXiv:2108.13612. doi:10.1093/mnras/stab2477. ISSN 0035-8711.
  8. ^ González-Santamaría, I.; Manteiga, M.; Manchado, A.; Ulla, A.; Dafonte, C.; Varela, P. López (2021-12-01). "Planetary nebulae in Gaia EDR3: Central star identification, properties, and binarity". Astronomy & Astrophysics. 656: A51. arXiv:2109.12114. Bibcode:2021A&A...656A..51G. doi:10.1051/0004-6361/202141916. ISSN 0004-6361.
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