+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   32 Pomona (A854 UA) Classification: Main-belt Asteroid          SPK-ID: 2000032 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 113 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08179169930826583 4.3357e-08   a 2.586607675550328 7.4673e-09 au q 2.375044638323263 1.1233e-07 au i 5.522175776795351 4.6395e-06 deg node 220.3801077295823 4.6862e-05 deg peri 338.9157473763179 5.4699e-05 deg M 174.6053326708521 3.02e-05 deg tp 2458463.530910833933 (2018-Dec-11.03091083) 0.00012641 TDB period 1519.477486978688 4.16 6.5799e-06 1.801e-08 d yr n .2369235497630307 1.026e-09 deg/d Q 2.798170712777392 8.0781e-09 au   Orbit Determination Parameters    # obs. used (total)      2556      data-arc span      57353 days (157.02 yr)      first obs. used      1864-01-07      last obs. used      2021-01-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54769      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:42:50   Additional Information  Earth MOID = 1.37213 au   Jupiter MOID = 2.16728 au   T_jup = 3.411  [ 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 7.66   n/a E2021B10 IRAS observations used: 25 diameter diameter 80.76 km 1.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 25 rotation period rot_per 9.448 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Schober, H.J. (1976) Astron. Astrophys. 53, 115-119.] [Chang, Y.C.; Zhou, X.-h.; Yang, X.-y.; Zhang, Y.-y.; et al. (1981) Acta Astron. Sin. 22, 169-173; Chin. Astron. Astrophys. 5, 434-437.] [Di Martino, M.; Zappala, V.; De Sanctis, G.; Cacciatori, S. (1987) Icarus 69, 338-353.] [Erikson, A.; Magnusson, P. (1993) Icarus 103, 62-66.] [Dotto, E.; De Angelis, G.; Di Martino, M.; Barucci, M.A.; et al. (1995) Icarus 117, 313-327.] [Kaasalainen, M.; Torppa, J.; Piironen, J. (2002) Icarus 159, 369-395.] [Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.2564   0.010 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 25 B-V BV 0.857   0.017 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=9; phase (min.=3.45, mean=13.75, max.=24.02) deg. U-B UB 0.429   0.025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=9; phase (min.=3.45, mean=13.75, max.=24.02) deg. Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 32 Pomona (A854 UA)          Discovered 1854-Oct-26 by Goldschmidt, H. at Paris Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A854 UA = 1945 RB = 1949 SH = 1950 YD = A899 QA = A911 KF  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-27 20:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin