332 Siri

332 Siri

Discovery
Discovered by	Max Wolf
Discovery site	Heidelburg
Discovery date	19 March 1892
Designations
Alternative names	A896 BA, A922 XA
Minor planet category	Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	124.05 yr (45308 d)
Aphelion	3.0216 AU (452.02 Gm)
Perihelion	2.5269 AU (378.02 Gm)
Semi-major axis	2.7742 AU (415.01 Gm)
Eccentricity	0.089172
Orbital period	4.62 yr (1687.8 d)
Average orbital speed	17.89 km/s
Mean anomaly	186.290°
Mean motion	0° 12^m 47.88^s / day
Inclination	2.8473°
Longitude of ascending node	31.575°
Argument of perihelion	296.463°
Earth MOID	1.51646 AU (226.859 Gm)
Jupiter MOID	2.24708 AU (336.158 Gm)
Jupiter Tisserand parameter	3.328
Proper orbital elements
Proper mean motion	77.941 deg / yr
Proper orbital period	4.61888 yr (1687.045 d)
Physical characteristics
Dimensions	40.37±1.8 km
Rotation period	8.0074 h (0.33364 d)
Geometric albedo	0.1719±0.017
Temperature	~160 K (equilibrium)[2]
Absolute magnitude (H)	9.7,[1] 9.65[3]

332 Siri is a main belt asteroid in orbit around the Sun. It was discovered by German astronomer Max Wolf on March 19, 1892 in Heidelberg.^[3] The origin of this asteroid's name is unclear. On October 5, 2092, 332 Siri will pass 4,981,670 km (3,095,470 mi) from the asteroid 29 Amphitrite with a relative velocity of 2.054 kilometers per second.^[1]

References

1. "332 Siri". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 332. Retrieved 11 May 2016.
2. "Planetary Habitability Calculators". Planetary Habitability Laboratory. University of Puerto Rico at Arecibo. Retrieved 27 November 2015.
3. Warner, Brian D. (December 2007), "Initial Results of a Dedicated H-G Project", The Minor Planet Bulletin, 34, pp. 113–119, Bibcode:2007MPBu...34..113W.

External links

• 332 Siri at the JPL Small-Body Database
  
  • Discovery · Orbit diagram · Orbital elements · Physical parameters