+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   137 Meliboea (A874 HA) Classification: Main-belt Asteroid          SPK-ID: 2000137 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 112 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2117860925934592 1.4446e-08   a 3.125458340192174 7.0352e-09 au q 2.463529730759235 4.4981e-08 au i 13.42748245033083 3.2686e-07 deg node 202.1891453395666 3.9751e-06 deg peri 107.4843355445916 5.6939e-06 deg M 181.048115950937 7.138e-06 deg tp 2460399.735226146197 (2024-Mar-30.23522615) 4.2721e-05 TDB period 2018.222291046742 5.53 6.8143e-06 1.866e-08 d yr n .1783748012283065 6.0227e-10 deg/d Q 3.787386949625112 8.5252e-09 au   Orbit Determination Parameters    # obs. used (total)      3423      data-arc span      49733 days (136.16 yr)      first obs. used      1885-04-18      last obs. used      2021-06-17      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .42031      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 10:34:56   Additional Information  Earth MOID = 1.49029 au   Jupiter MOID = 1.80975 au   T_jup = 3.138  [ 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 8.19   n/a MPCxxxxx IRAS observations used: 11 diameter diameter 128.678 km 0.533 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 25.676 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pilcher, F.; Jardine, D. (2009) Minor Planet Bull. 36, 52-54.] [Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.065   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.689   0.031 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=7.19, mean=11.61, max.=17.67) deg. U-B UB 0.326   0.041 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=7.19, mean=11.08, max.=17.67) deg. Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo 137 Meliboea (A874 HA)          Discovered 1874-Apr-21 by Palisa, J. at Pola Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A874 HA = 1958 UE = 1962 GB = A923 FA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jul-27 07:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin