+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   163899 (2003 SD220) Classification: Aten [NEO, PHA]          SPK-ID: 2163899 [ 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 118 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2106631489413145 1.2818e-08   a .8266894579364465 2.3497e-09 au q .6525364535309663 1.1633e-08 au i 8.514896073188588 2.4065e-06 deg node 273.9156702953292 2.7207e-06 deg peri 326.9343547763833 4.8558e-06 deg M 192.5108666951268 4.6431e-06 deg tp 2459128.230955388757 (2020-Oct-05.73095539) 3.8005e-06 TDB period 274.5440437395515 0.75 1.1705e-06 3.205e-09 d yr n 1.311265016339298 5.5905e-09 deg/d Q 1.000842462341927 2.8447e-09 au   Orbit Determination Parameters    # obs. used (total)      1123      # delay obs. used      9      # Doppler obs. used      4      data-arc span      7708 days (21.10 yr)      first obs. used      2000-01-06      last obs. used      2021-02-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .21056      source      ORB      producer      Otto Matic      solution date      2021-Feb-12 05:25:24   Additional Information  Earth MOID = .0181332 au   Jupiter MOID = 4.00497 au   T_jup = 7.065  [ 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 17.9   n/a MPO493931   diameter diameter 0.791 km 0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   rotation period rot_per 285. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Warner, B.D. (2016) Minor Planet Bull. 43, 143-154.] [Skiff, B.A.; McLelland, K.P.; Sanborn, J.J.; Pravec, P.; Koehn, B.W. (2019) Minor Plantet Bull. 46, 238-265.] geometric albedo albedo 0.340   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   163899 (2003 SD220)          Discovered 2003-Sep-29 by LONEOS at Anderson Mesa Reference: 20070926/Numbers.arc Last Updated: 2007-09-30 [ show close-approach data ] Alternate Designations  2003 SD220 = 2000 AD229  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-25 04:52 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin