In the Vinony graph
Within Vinony's link graph, Ersa is referenced by 103 other articles, and connects out to list of moons of Jupiter, provisional designation in astronomy and Canada–France–Hawaii Telescope.
It sits within the topics Astronomical objects discovered in 2018, Discoveries by Scott S. Sheppard and Himalia group.
Its subject is documented across 32 Wikipedia language editions.
Key facts
- Discovered by
- Scott S. Sheppard
- Discovery site
- Cerro Tololo Obs.
- Discovery date
- 11 May 2018
- Designation
- Jupiter LXXI
- Pronunciation
- / ˈ ɜːr s ə /
- Named after
- Ἔρσα Ersa
- Alternative names
- S/2018 J 1
- Observation arc
- 24 years, 2024-12-03 (last obs)
- Earliest precovery date
- 6 August 2000
- Satellite of
- Jupiter
- Group
- Himalia group
- Proper semi major axis
- 11,401,000 km (0.07621 AU ) AU
- Proper inclination
- 29.1° (to ecliptic )
- Proper mean motion
- 527.587231 deg / yr
- Proper orbital period
- 0.68235 yr , (249.229 d )
- Precession of perihelion long
- 8994.503 arcsec / yr
- Precession of asc node
- 4232.058 arcsec / yr
- Mean diameter
- ≈ 3 km
via Wikipedia infobox
Wikidata facts
- Instance of
- irregular moon
- Parent body
- Jupiter
- Diameter
- 3
- Orbital period
- 252
- Image
- Ersa CFHT precovery 2003-02-24.png
Show 6 more facts
- time of discovery or invention
- 2018-00-00
- discoverer or inventor
- Scott S. Sheppard
- orbital eccentricity
- 0.094
- semi-major axis of an orbit
- 11460000
- provisional designation
- S/2018 J 1
- Commons category
- Ersa (moon)
Sources (2)
via Wikidata · CC0
~2 min read
Encyclopedic overview
Ersa /ˈɜːrsə/, also designated Jupiter LXXI, is a small outer natural satellite of Jupiter discovered by Scott S. Sheppard on 11 May 2018, using the 4.0-meter Víctor M. Blanco Telescope at Cerro Tololo Observatory, Chile. It was announced alongside nine other Jovian moons on 17 July 2018 and was provisionally designated S/2018 J 1 by the Minor Planet Center, after observations were collected over a long enough time span to confirm the satellite's orbit. The satellite has been found in precovery observations as early as 6 August 2000.
Ersa is part of the Himalia group, a tight cluster of prograde irregular moons of Jupiter that follow similar orbits to Himalia at semi-major axes between 11–12 million km (6.8–7.5 million mi) and inclinations between 26–31°. With an estimated diameter of 3 km (1.9 mi) for an absolute magnitude of 15.9, it is one of the smallest known members of the Himalia group.
Excerpted from Wikipedia’s “Ersa” article, available under the CC BY-SA 4.0 licence.