+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   26 Proserpina (A853 JA) Classification: Main-belt Asteroid          SPK-ID: 2000026 [ 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 125 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08964686559991078 3.2941e-08   a 2.655568344178825 6.8396e-09 au q 2.417504965736848 8.7069e-08 au i 3.562407878826037 3.3646e-06 deg node 45.77316539836419 6.9061e-05 deg peri 193.5795489575874 7.3521e-05 deg M 242.2799375227941 2.7194e-05 deg tp 2459717.371557618100 (2022-May-17.87155762) 0.00012008 TDB period 1580.646126301075 4.33 6.1066e-06 1.672e-08 d yr n .227754962992538 8.799e-10 deg/d Q 2.893631722620802 7.4528e-09 au   Orbit Determination Parameters    # obs. used (total)      2742      data-arc span      58426 days (159.96 yr)      first obs. used      1861-01-31      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49787      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:42:48   Additional Information  Earth MOID = 1.40397 au   Jupiter MOID = 2.10121 au   T_jup = 3.380  [ 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 7.49   n/a E2021B10   diameter diameter 94.80 km 1.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16 rotation period rot_per 13.110 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Scaltriti, F.; Zappala, V. (1979) Icarus 39, 124-130.] [Ditteon, R.; Hawkins, S. (2007) Minor Planet Bull. 34, 59-64.] [Fauerbach, M.; Marks, S.A.; Lucas, M.P. (2008) Minor Planet Bull. 35, 44-46.] [Pilcher, F. (2008) Minor Planet Bull. 35, 135-138.] [Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Pilcher, F. (2013) Minor Planet Bull. 40, 189.] [Bin, L.; Hai-bin, Z.; Xin, W. (2016) Chinese Astron. Astrophys. 40, 373-385.] [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.] geometric albedo albedo 0.1966   0.007 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16 B-V BV 0.891   0.018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=4.17, mean=15.15, max.=21.44) deg. U-B UB 0.525   0.056 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=4.17, mean=15.15, max.=21.44) deg. Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo 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) 26 Proserpina (A853 JA)          Discovered 1853-May-05 by Luther, R. at Dusseldorf Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A853 JA = 1935 KK = 1954 WD1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-08 01:35 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin