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1108 Demeter information


For other uses, see Demeter (disambiguation).

1108 Demeter
Discovery[1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date31 May 1929
Designations
MPC designation
(1108) Demeter
Pronunciation/dɪˈmiːtər/[2]
Named after
Demeter (Greek mythology)[3]
Alternative designations
1929 KA · 1963 MF
Minor planet category
main-belt · (inner)
Phocaea[4] · background[5]
Orbital characteristics[1]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc88.65 yr (32,378 d)
Aphelion3.0510 AU
Perihelion1.8040 AU
Semi-major axis
2.4275 AU
Eccentricity0.2568
Orbital period (sidereal)
3.78 yr (1,381 d)
Mean anomaly
139.57°
Mean motion
0° 15m 38.16s / day
Inclination24.916°
Longitude of ascending node
234.25°
Argument of perihelion
78.109°
Physical characteristics
Mean diameter
25.285±0.057 km[6]
25.35±6.72 km[7]
25.61±2.0 km[8]
27.316±0.221 km[9]
27.333±5.042 km[10]
31.06±0.58 km[11]
31.33±0.45 km[12]
Synodic rotation period
9.70±0.01 h[13]
9.701±0.002 h[14]
9.846±0.008 h[15]
9.870±0.012 h[16]
Geometric albedo
0.0229±0.0202[10]
0.031±0.005[12]
0.032±0.001[11]
0.0408±0.0040[9]
0.0464±0.008[8]
0.05±0.02[7]
Spectral type
Tholen = CX[1][4]
B–V = 0.681[1]
U–B = 0.308[1]
Absolute magnitude (H)
11.91[1][4][7][8][9][11][12]
12.51[10] · 12.51±0.38[17]

1108 Demeter, provisional designation 1929 KA, is a dark asteroid from the inner regions of the asteroid belt, approximately 27 kilometers (17 miles) in diameter. It was discovered on 31 May 1929, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory near Heidelberg, Germany.[18] The asteroid was named after Demeter, the Greek goddess of fruitful soil and agriculture.[3] It has a rotation period of 9.846 hours.

  1. ^ a b c d e f Cite error: The named reference jpldata was invoked but never defined (see the help page).
  2. ^ "Demeter". Merriam-Webster.com Dictionary.
  3. ^ a b Cite error: The named reference springer was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference lcdb was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference AstDys-object was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Masiero-2014 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Nugent-2015 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference SIMPS was invoked but never defined (see the help page).
  9. ^ a b c Cite error: The named reference WISE was invoked but never defined (see the help page).
  10. ^ a b c Cite error: The named reference Masiero-2017 was invoked but never defined (see the help page).
  11. ^ a b c Cite error: The named reference AKARI was invoked but never defined (see the help page).
  12. ^ a b c Cite error: The named reference Masiero-2012 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Stephens-2002a was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference geneva-obs was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Polakis-2016 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Brines-2017 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference Veres-2015 was invoked but never defined (see the help page).
  18. ^ Cite error: The named reference MPC-object was invoked but never defined (see the help page).

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