705 Erminia

705 Erminia

Animation of 705 Erminia's orbit 2000-2020    Sun   Earth ·    Mars ·   Jupiter ·    705 Erminia
Discovery
Discovered by	E. Ernst
Discovery site	Heidelberg Obs.
Discovery date	6 October 1910
Designations
MPC designation	(705) Erminia
Pronunciation	/ərˈmɪniə/
Alternative designations	1910 KV
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	105.53 yr (38544 d)
Aphelion	3.0635189 AU (458.29590 Gm)
Perihelion	2.7809463 AU (416.02365 Gm)
Semi-major axis	2.92223259 AU (437.159773 Gm)
Eccentricity	0.04834875
Orbital period (sidereal)	5.00 yr (1824.6 d)
Mean anomaly	348.73426°
Mean motion	0° 11^m 50.288^s / day
Inclination	25.045517°
Longitude of ascending node	2.8949214°
Argument of perihelion	101.35517°
Physical characteristics
Dimensions	128 km × 141 km (occultation)
Mean diameter	132.261±1.178 km[1][2] 70-130 km (assumed albedo=0.05-0.3) 134.22 ±2.3 (IRAS) 133.9-134.5 (albedo estimate)
Mass	(4.12 ± 1.775/0.942)×10^18 kg[2]
Mean density	3.401 ± 1.465/0.778 g/cm^3[2]
Synodic rotation period	53.96 h (2.248 d)
Geometric albedo	0.031±0.005[1]
Spectral type	X (tholen) C (SMASSII) B-V = 0.667-0.725 U-B = 0.249-0.327
Absolute magnitude (H)	8.51[1]

705 Erminia is a minor planet orbiting the Sun. Its name derives from the comic opera Erminie. An occultation on 8 December 2014 gave 3 chords, with one measurement suggesting a small moon 6-10 kilometers wide at a distance of 400 kilometers to the primary.^[3]

See also

• List of Solar System objects by size

References

1. "705 Erminia (1910 KV)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 6 May 2016.
2. Fienga, A.; Avdellidou, C.; Hanuš, J. (February 2020). "Asteroid masses obtained with INPOP planetary ephemerides". Monthly Notices of the Royal Astronomical Society. 492 (1): 589–602. doi:10.1093/mnras/stz3407.
3. "OCCULTATION OF UCAC4 315_245088 BY 705 Erminia 2014 December 08". occultations.org. Retrieved 8 February 2015.

External links

• Lightcurve plot of (705) Erminia, Antelope Hills Observatory
• Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 705 Erminia at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 705 Erminia at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters