113390 Helvetia
| Discovery Perihelion | 1.8353 AU | |
|---|---|---|
| 2.3033 AU | ||
| Eccentricity | 0.2032 | |
| 3.50 yr (1,277 d) | ||
| 314.06° | ||
| 0° 16m 55.2s / day | ||
| Inclination | 7.3588° | |
| 298.47° | ||
| 8.6509° | ||
| Physical characteristics | ||
Mean diameter | 2.196±0.360[6][7][8] | |
| 0.231±0.103[6][7][8] | ||
| S (assumed)[5] | ||
| 15.5[8] 15.6[1][2] | ||
113390 Helvetia (
Markus Griesser at the Eschenberg Observatory in Winterthur, near Zürich, Switzerland. The presumed stony Florian asteroid was named after the Swiss national symbol, Helvetia.[1]
Orbit and classification
Helvetia is a non-
402), a giant asteroid family and the largest family of stony asteroids in the main-belt.[5]
It orbits the Sun in the
semi-major axis of 2.3 AU). Its orbit has an eccentricity of 0.20 and an inclination of 7° with respect to the ecliptic.[2] The asteroid's observation arc begins 42 years prior to its official discovery observation, with a precovery taken at the Palomar Observatory in September 1960.[1]
Naming
This
M.P.C. 55989).[9]
Physical characteristics
Helvetia is an assumed, stony
spectral type.[5]
Lightcurve
In April 2014, Helvetia was
rotation period and shape still remain unknown.[5]
Diameter and albedo
According to the
stony asteroids.[6][7][8] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of its family – and calculates a diameter of 2.06 kilometers based on an absolute magnitude of 15.6.[5]
References
- ^ a b c d e f g "113390 Helvetia (2002 SU19)". Minor Planet Center. Retrieved 28 February 2019.
- ^ a b c d "JPL Small-Body Database Browser: 113390 Helvetia (2002 SU19)" (2018-03-09 last obs.). Jet Propulsion Laboratory. Retrieved 28 February 2019.
- ^ a b "Asteroid (113390) Helvetia – Proper elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 28 February 2019.
- ^ a b "Asteroid 113390 Helvetia". Small Bodies Data Ferret. Retrieved 28 February 2019.
- ^ a b c d e f "LCDB Data for (113390) Helvetia". Asteroid Lightcurve Database (LCDB). Retrieved 28 February 2019.
- ^ Bibcode:2016PDSS..247.....M. Retrieved 28 February 2019.
- ^ S2CID 118745497.
- ^ )
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 28 February 2019.
External links
- Eschenberg Observatory – website
- Discovery image with HIP 4703 (brightest star) at Eschenberg Observatory (2002)
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- 113390 Helvetia at AstDyS-2, Asteroids—Dynamic Site
- 113390 Helvetia at the JPL Small-Body Database
