207 Hedda

Hedda (minor planet designation: 207 Hedda) is a sizeable Main belt asteroid. It is a C-type asteroid, meaning it is primitive in composition and dark in colour. This asteroid was discovered by Johann Palisa on October 17, 1879, in Pola and was named after Hedwig, wife of astronomer Friedrich A. T. Winnecke.

207 Hedda
Discovery
Discovered byJohann Palisa
Discovery date17 October 1879
Designations
(207) Hedda
PronunciationGerman: [ˈhɛdaː]
1932 CL1, 1934 XJ,
1953 BF
Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc133.61 yr (48801 d)
Aphelion2.3497 AU (351.51 Gm)
Perihelion2.2177 AU (331.76 Gm)
2.2837 AU (341.64 Gm)
Eccentricity0.028894
3.45 yr (1260.5 d)
19.71 km/s
34.9926°
0° 17m 8.124s / day
Inclination3.8036°
29.212°
192.936°
Physical characteristics
Dimensions58.70±1.3 km
30.098 h (1.2541 d)[1]
19.489 h[2]
0.0552±0.003
C
9.92

    Attempts to determine the rotation period for this asteroid have led to conflicting results. A study published in 2010 using photometric observations from Organ Mesa Observatory showed a rotation period of 19.489 ± 0.002 hours and a brightness variation of 0.18 ± 0.02 in magnitude.[2]

    References
    1. "207 Hedda". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
    2. Pilcher, Frederick (January 2010), "Rotational Period Determination for 23 Thalia, 204 Kallisto and 207 Hedda, and Notes on 161 Athor and 215 Oenone", The Minor Planet Bulletin, 37 (1): 21–23, Bibcode:2010MPBu...37...21P.


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