+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1180 Rita (1931 GE) Classification: Outer Main-belt Asteroid          SPK-ID: 2001180 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 41 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .15834086799849 3.419e-08   a 4.004756154378273 3.0611e-08 au q 3.370639588771723 1.4855e-07 au i 7.193145952286788 4.1116e-06 deg node 88.27873633326305 3.0594e-05 deg peri 206.9128781360512 3.3608e-05 deg M 359.4567275157032 1.52e-05 deg tp 2459004.917512140269 (2020-Jun-04.41751214) 0.00012362 TDB period 2927.268390106869 8.01 3.3563e-05 9.189e-08 d yr n .1229815486740719 1.41e-09 deg/d Q 4.638872719984824 3.5458e-08 au   Orbit Determination Parameters    # obs. used (total)      3336      data-arc span      41348 days (113.20 yr)      first obs. used      1907-04-04      last obs. used      2020-06-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43519      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 15:27:23   Additional Information  Earth MOID = 2.35681 au   Jupiter MOID = .581157 au   T_jup = 3.018  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 9.2   n/a MPO492764   diameter diameter 97 km n/a J.G. Williams (E-mail September 1990) based on assumed albedo of 0.048 for C-type rotation period rot_per 14.849 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Gonano, M.; Di Martino, M.; Mottola, S.; Neukum, G. (1991) Adv. Space Res. 11, no. 12, 197-200.] [Dahlgren, M.; Lahulla, J.F.; Lagerkvist, C.-I.; Lagerros, J.; et al. (1998) Icarus 133, 247-285.] [Warner, B.D. (2018) Minor Planet Bull. 45, 390-393.] geometric albedo albedo 0.058   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)   B-V BV 0.682   0.042 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=7.65, mean=13.11, max.=16.19) deg. U-B UB 0.216   0.018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=7.65, mean=11.92, max.=16.19) deg. Tholen spectral type spec_T P   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo 1180 Rita (1931 GE)          Discovered 1931-Apr-09 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1931 GE = 1929 CM = 1953 AH = 1957 UF1 = A907 GG = A908 KA = A916 LA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-08 13:40 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin