200 Dynamene

200 Dynamene
Orbital diagram
Discovery
Discovered byC. H. F. Peters, 1879
Discovery date27 July 1879
Designations
(200) Dynamene
Pronunciation/daɪˈnæmɪniː/[1]
A879 OA; 1904 CA;
1955 HZ; 1961 TO1;
1974 HE1
Main belt
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc136.47 yr (49845 d)
Aphelion3.1020 AU (464.05 Gm)
Perihelion2.3728 AU (354.97 Gm)
2.7374 AU (409.51 Gm)
Eccentricity0.13320
4.53 yr (1654.3 d)
10.506°
0° 13m 3.432s / day
Inclination6.8957°
324.57°
85.089°
Earth MOID1.39358 AU (208.477 Gm)
Jupiter MOID2.2934 AU (343.09 Gm)
TJupiter3.328
Physical characteristics
Dimensions128.36±2.1 km[2]
130.71 ± 3.01 km[3]
Mass(1.07 ± 0.16) × 1019 kg[3]
Mean density
9.14 ± 1.51 g/cm3[3]
37.394 h (1.5581 d)[2][4]
0.0533±0.002
C
8.26

200 Dynamene is a large dark main-belt asteroid that was discovered by German-American astronomer Christian Heinrich Friedrich Peters on July 27, 1879, in Clinton, New York. The name derives from Dynamene, one of the fifty Nereids in Greek mythology. Based upon its spectrum, 200 Dynamene is classified as a C-type asteroid, indicating that it probably has a primitive composition similar to the carbonaceous chondrite meteorites. The spectra of the asteroid displays evidence of aqueous alteration.[5]

Photometric observations of this asteroid at the Organ Mesa Observatory in Las Cruces, New Mexico in 2011 gave a light curve with a period of 37.394 ± 0.002 hours and a brightness variation of 0.10 ± 0.01 in magnitude. The curve is asymmetrical with four uneven minima and maxima.[4]

Occultation data from October 9, 2006, using 15 chords shows the asteroid is about 130 km in diameter.[6]

  1. ^ Noah Webster (1884) A Practical Dictionary of the English Language
  2. ^ a b c Cite error: The named reference JPL was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Carry2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Pilcher39 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Fornasier1999 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference asteroidoccultation was invoked but never defined (see the help page).