+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   620 Drakonia (A906 UO) Classification: Main-belt Asteroid          SPK-ID: 2000620 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 46 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1344058414071706 3.6024e-08   a 2.435439959555675 6.4069e-09 au q 2.108102602594949 8.7355e-08 au i 7.736568322310704 4.2023e-06 deg node 359.9460839786989 2.5156e-05 deg peri 336.1850760010051 2.9537e-05 deg M 63.42985413494252 1.5523e-05 deg tp 2458955.900378887064 (2020-Apr-16.40037889) 5.9873e-05 TDB period 1388.240045662476 3.80 5.4781e-06 1.5e-08 d yr n .259321146313861 1.0233e-09 deg/d Q 2.762777316516401 7.268e-09 au   Orbit Determination Parameters    # obs. used (total)      3842      data-arc span      32856 days (89.95 yr)      first obs. used      1931-03-27      last obs. used      2021-03-10      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .35056      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 11:11:21   Additional Information  Earth MOID = 1.09985 au   Jupiter MOID = 2.61523 au   T_jup = 3.480  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 10.97   n/a E2021B10   diameter diameter 11.385 km 0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 5.487 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Warner, B.D. (2002) Minor Planet Bull. 29, 27-28.] [Bel'skaya, I.N.; Shevchenko, V.G.; Kiselev, N.; Krugly, Yu.N.; et al. (2003) Icarus 166, 276-284.] [Almeida, R.; Angeli, C.A.; Duffard, R.; Lazzaro, D. (2004) Astron. Astrophys. 415, 403-406.] [Li, B.; Zhao, H.; Yao, J. (2011) Minor Planet Bull. 38, 179-180.] [Warner, B.D. (2011) Minor Planet Bull. 38, 52-54.] [Klinglesmith III, D.A.; Hanowell, J.; Risley, E.; Turk, J.; et al. (2014) Minor Planet Bull. 41, 139-143.] [Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] geometric albedo albedo 0.419   0.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.683   0.033 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=1.51 deg. U-B UB 0.237   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=1.51 deg. Tholen spectral type spec_T E   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo 620 Drakonia (A906 UO)          Discovered 1906-Oct-26 by Metcalf, J. H. at Taunton Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  A906 UO = 1950 ET = 1950 HS = 1955 QE1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-23 00:54 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin