Planetary Nebula Ethos 1

Ethos 1
Ethos 1: Planetary nebula in Lyra; 500 mm Cassegrain 3625 mm f/7.2; SBIG STL11K; 530+3*80 min LRGB; Bernese Highlands; © 2015 Radek Chromik

History

The planetary nebula Ethos 1 (PN G068.1+11.0) was discovered in 2009 by Miszalski et al. Discovered in the «SuperCOSMOS Science Archive» data during the design phase of the «Extremely Turquoise Halo Object Survey» (ETHOS). In this investigation, a spectroscopic search was carried out specifically for planetary nebulae outside the Milky Way plane, which were overlooked during a visual inspection.

Physical Properties

Ethos 1 is noticeable as one of the few planetary nebulae that both bipolar jets travel at speeds of 120±10 km/s, as well as having a tight binary central star. The observed light curve shows an orbital time of only 0.535 days with a very strong amplitude of 0.816 mag, due to the overexposure by a very hot pre-white dwarf star. Ethos 1 underpins the long suspected connection between binary central stars and jets. The kinematic age of the jets is estimated to be 1750±250 yr/kpc, which is higher than the inner nebula of 900±100 yr/kpc. [401]

Data for Ethos 1 [145]
Designations Ethos 1, PN G068.1+11.0
RA (ICRS) 19h 16m 31.5s
Dec (ICRS) +36° 09' 47.7"

Finder Chart

The planetary nebula Ethos 1 is located in the constellation Lyra. The best observation time is April to October.

Chart Ethos 1
Chart created using SkySafari 6 Pro and STScI Digitized Sky Survey. [149, 160]

References

145SIMBAD astronomical database; simbad.u-strasbg.fr/simbad
149SkySafari 6 Pro, Simulation Curriculum; skysafariastronomy.com
160The STScI Digitized Sky Survey; archive.stsci.edu/cgi-bin/dss_form
401«ETHOS 1: a high-latitude planetary nebula with jets forged by a post-common-envelope binary central star» B. Miszalski, R. L. M. Corradi, H. M. J. Boffin, D. Jones, L. Sabin, M. Santander-García, P. Rodríguez-Gil, M. M. Rubio-Díez; Monthly Notices of the Royal Astronomical Society, Volume 413, Issue 2, May 2011, Pages 1264–1274; DOI:10.1111/j.1365-2966.2011.18212.x