Planetary Nebula Ethos 1
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]
| Name | Ethos 1 |
| Object Type | RS CVn Variable |
| Right Ascension (J2000.0) | 19h 16m 31s |
| Declination (J2000.0) | +36° 09' 48" |
| Parallaxes | 0.0669 mas |
| Magnitudes | G 17.200283; g 17.055; r 17.347 |
| Identifiers | ATO J289.1311+36.1632; Gaia DR2 2050526964622031744; Gaia DR3 2050526964622031744; NAME Ethos 1; PN G068.1+11.0; PN G068.1+11.1; ZTF J191631.48+360947.6 |
Finder Chart
The planetary nebula Ethos 1 is located in the constellation Lyra. On 10 July it is in opposition to the Sun and crosses the meridian at local midnight. The best observation time is January to December.
