+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1225 Ariane (1930 HK) Classification: Main-belt Asteroid          SPK-ID: 2001225 [ 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 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07463040129321764 2.6113e-08   a 2.2329057553374 4.6379e-09 au q 2.066263102766635 5.7331e-08 au i 3.073652355573793 3.8395e-06 deg node 12.37046334520677 5.4442e-05 deg peri 100.3273895561462 6.1706e-05 deg M 86.05594279879243 2.8281e-05 deg tp 2458709.171895795794 (2019-Aug-13.67189580) 9.5627e-05 TDB period 1218.720219691624 3.34 3.797e-06 1.04e-08 d yr n .2953918333209338 9.2032e-10 deg/d Q 2.399548407908166 4.984e-09 au   Orbit Determination Parameters    # obs. used (total)      3132      data-arc span      33539 days (91.82 yr)      first obs. used      1928-10-16      last obs. used      2020-08-13      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .40747      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:21:13   Additional Information  Earth MOID = 1.08538 au   Jupiter MOID = 2.65102 au   T_jup = 3.635  [ 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 12.1   n/a MPO452176   diameter diameter 9.194 km 0.091 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 5.5068 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Ditteon, R.; Tollefson, E.; Twarek, A. (2003) Minor Planet Bull. 30, 76-77.] [Goeden, C.J. (2004) Minor Planet Bull. 31, 11.] [Pray, D.P. (2004) Minor Planet Bull. 31, 6-8.] [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.302   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   1225 Ariane (1930 HK)          Discovered 1930-Apr-23 by Van Gent, H. at Johannesburg (LS) Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1930 HK = 1928 UD = 1958 TB  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-25 15:25 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin