325 Heidelberga

325 Heidelberga
Discovery
Discovered by	Max Wolf
Discovery date	4 March 1892
Designations
MPC designation	(325) Heidelberga
Pronunciation	/ˌhaɪdəlˈbɜːrɡə/
Named after	Heidelberg
Minor planet category	Main belt
Adjectives	Heidelergian /ˌhaɪdəlˈbɜːrdʒiən, -ɡiən/
Orbital characteristics
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	117.86 yr (43050 d)
Aphelion	3.7223 AU (556.85 Gm)
Perihelion	2.69998 AU (403.911 Gm)
Semi-major axis	3.21115 AU (480.381 Gm)
Eccentricity	0.15919
Orbital period (sidereal)	5.75 yr (2101.8 d)
Mean anomaly	7.2090°
Mean motion	0° 10m 16.608s / day
Inclination	8.5545°
Longitude of ascending node	344.881°
Argument of perihelion	68.563°
Physical characteristics
Dimensions	75.72±1.7 km
Synodic rotation period	6.737 h (0.2807 d)
Geometric albedo	0.1068±0.005
Absolute magnitude (H)	8.65

Heidelberga (minor planet designation: 325 Heidelberga) is a large Main belt asteroid that was discovered by German astronomer Max Wolf on 4 March 1892 in Heidelberg.

Based upon its spectrum, 325 Heidelberga is classified as an M-type asteroid. No absorption features have been detected with certainty, indicating it most likely has a nickel-iron or enstatite chondrite composition.^[2]

References[]

^ Yeomans, Donald K., "325 Heidelberga", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 11 May 2016.
^ Hardersen, Paul S.; Gaffey, Michael J.; Abell, Paul A. (January 1983), "Near-IR spectral evidence for the presence of iron-poor orthopyroxenes on the surfaces of six M-type asteroids", Icarus, vol. 175, no. 1, pp. 141–158, Bibcode:2005Icar..175..141H, doi:10.1016/j.icarus.2004.10.017.

External links[]

325 Heidelberga at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
325 Heidelberga at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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[JPL-1] Yeomans, Donald K., "325 Heidelberga", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 11 May 2016.

[Hardersen1983-2] Hardersen, Paul S.; Gaffey, Michael J.; Abell, Paul A. (January 1983), "Near-IR spectral evidence for the presence of iron-poor orthopyroxenes on the surfaces of six M-type asteroids", Icarus, vol. 175, no. 1, pp. 141–158, Bibcode:2005Icar..175..141H, doi:10.1016/j.icarus.2004.10.017.

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