984 Gretia

984 Gretia
3D-model of Gretia based on its lightcurve
Discovery [1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date27 August 1922
Designations
(984) Gretia
Pronunciation/ˈɡriːtiə/
Named after
Greta, sister-in-law of astronomer Albrecht Kahrstedt [2]
1922 MH · 1973 LC
A910 BA · A915 DA
main-belt · (middle)
background
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc94.45 yr (34,499 days)
Aphelion3.3562 AU
Perihelion2.2495 AU
2.8028 AU
Eccentricity0.1974
4.69 yr (1,714 days)
65.271°
0° 12m 36s / day
Inclination9.0930°
314.21°
55.494°
Physical characteristics
Dimensions31.91±3.1 km[3][4]
32.449±0.306 km[5]
34.91±0.47 km[6]
36.600±0.187 km[7]
5.560±0.018 h[8]
5.76 h[9]
5.778±0.001 h[10]
5.778026±0.000001 h[11]
5.77827±0.00005 h[10]
5.7789±0.0002 h[12]
5.780±0.001 h[13]
5.781 h[14][15]
0.3566±0.0863[7]
0.360±0.012[6]
0.421±0.038[5]
0.4239±0.095[3]
SMASS = Sr [1] · S [4]
B–V = 0.950±0.030[8]
9.03[1][3][4][6][7] · 9.52±0.16[16]

984 Gretia /ˈɡriːtiə/ is a stony background asteroid from the central regions of the asteroid belt, approximately 32 kilometers (20 miles) in diameter. It was discovered by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory on 27 August 1922 and given the provisional designation 1922 MH.[17] The asteroid was named after Greta, sister-in-law of ARI-astronomer Albrecht Kahrstedt.[17]

  1. ^ a b c d Cite error: The named reference jpldata was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference springer was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference SIMPS 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. ^ a b Cite error: The named reference Masiero-2014 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference AKARI was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference WISE was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Riccioli-2001 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Van-Houten-1962 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference geneva-obs was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Marciniak-2008b was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Schmidt-2017 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Gandolfi-2009 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Di-Martino-1984c was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Piironen-1994 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Veres-2015 was invoked but never defined (see the help page).
  17. ^ a b Cite error: The named reference MPC-object was invoked but never defined (see the help page).