+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   792 Metcalfia (A907 FC) Classification: Main-belt Asteroid          SPK-ID: 2000792 [ 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 49 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1314682933511742 3.8423e-08   a 2.621999290281991 7.7568e-09 au q 2.277289518420627 1.0084e-07 au i 8.625163624850696 3.3479e-06 deg node 265.0704390901621 2.757e-05 deg peri 227.5506117248193 3.0383e-05 deg M 280.1005378679512 1.3852e-05 deg tp 2459344.682382502820 (2021-May-10.18238250) 6.0165e-05 TDB period 1550.769609640651 4.25 6.8816e-06 1.884e-08 d yr n .232142800427602 1.0301e-09 deg/d Q 2.966709062143354 8.7766e-09 au   Orbit Determination Parameters    # obs. used (total)      2896      data-arc span      38623 days (105.74 yr)      first obs. used      1915-02-04      last obs. used      2020-11-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4216      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:56:11   Additional Information  Earth MOID = 1.30224 au   Jupiter MOID = 2.14911 au   T_jup = 3.376  [ 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 10.2   n/a MPO502160 IRAS observations used: 15 diameter diameter 61.804 km 0.380 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 9.17 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Carlsson, M.; Lagerkvist, C.-I. (1981) Astron. Astrophys. Suppl. Ser. 44, 15-22.] [Sarneczky, K.; Szabo, G.; Kiss, L.L. (1999) Astron. Astrophys. Suppl. Ser. 137, 363-368.] [Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.] geometric albedo albedo 0.024   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   B-V BV 0.708   0.003 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=11.76, mean=12.31, max.=12.86) deg. U-B UB 0.213   0.009 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=11.76, mean=12.31, max.=12.86) deg. SMASSII spectral type spec_B X   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) 792 Metcalfia (A907 FC)          Discovered 1907-Mar-20 by Metcalf, J. H. at Taunton Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-25 08:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin