+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   343 Ostara (A892 VA) Classification: Main-belt Asteroid          SPK-ID: 2000343 [ 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 46 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2291772208613804 2.6658e-08   a 2.411900325740072 5.5152e-09 au q 1.859147712092304 6.5208e-08 au i 3.259185951650709 3.2872e-06 deg node 38.59011094362342 6.5334e-05 deg peri 10.28268374738096 6.5875e-05 deg M 24.08483162055436 8.7857e-06 deg tp 2458908.966814907642 (2020-Feb-29.46681491) 3.3316e-05 TDB period 1368.161802099845 3.75 4.6928e-06 1.285e-08 d yr n .2631267730523353 9.0253e-10 deg/d Q 2.96465293938784 6.7792e-09 au   Orbit Determination Parameters    # obs. used (total)      2964      data-arc span      46752 days (128.00 yr)      first obs. used      1892-11-15      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .40215      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:52:53   Additional Information  Earth MOID = .869438 au   Jupiter MOID = 2.4269 au   T_jup = 3.481  [ 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 11.7   n/a MPO502156 IRAS observations used: 5 diameter diameter 18.213 km 0.077 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 109.87 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Stephens, R.D. (2009) Minor Planet Bull. 36, 59-62.] [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.] geometric albedo albedo 0.092   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.770   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=6.66, mean=7.55, max.=8.45) deg. U-B UB 0.463   0.041 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=6.66, mean=7.55, max.=8.45) deg. Tholen spectral type spec_T CSGU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices 343 Ostara (A892 VA)          Discovered 1892-Nov-15 by Wolf, M. at Heidelberg 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-24 22:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin