+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 108 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2118429970863699 3.1892e-08   a 3.12520261835322 8.7307e-09 au q 2.463150329179104 1.0133e-07 au i 13.42716008009828 3.3064e-06 deg node 202.2019180733637 1.1663e-05 deg peri 107.4319747325436 1.3912e-05 deg M 146.1423608910175 8.7197e-06 deg tp 2458381.301187042545 (2018-Sep-19.80118704) 4.694e-05 TDB period 2017.974602754691 5.52 8.4562e-06 2.315e-08 d yr n .1783966951360895 7.4756e-10 deg/d Q 3.787254907527338 1.058e-08 au   Orbit Determination Parameters    # obs. used (total)      3207      data-arc span      49589 days (135.77 yr)      first obs. used      1885-04-18      last obs. used      2021-01-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .41822      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:43:45   Additional Information  Earth MOID = 1.48867 au   Jupiter MOID = 1.81048 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 8.18   n/a E2020-QM5 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-Mar-02 17:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin