+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   153591 (2001 SN263) Classification: Amor [NEO, PHA]          SPK-ID: 2153591 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 155 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4792074542546931 1.7009e-08   a 1.986556656635378 1.3939e-08 au q 1.034583898476424 3.2715e-08 au i 6.694941605682678 4.1612e-06 deg node 325.7576411826527 1.2413e-05 deg peri 172.9898710914624 1.4152e-05 deg M 210.6692155825493 1.9211e-05 deg tp 2459624.725437269432 (2022-Feb-14.22543727) 5.9015e-05 TDB period 1022.703778144413 2.80 1.0764e-05 2.947e-08 d yr n .3520080864990855 3.7048e-09 deg/d Q 2.938529414794332 2.0618e-08 au   Orbit Determination Parameters    # obs. used (total)      899      # delay obs. used      1      # Doppler obs. used      0      data-arc span      10949 days (29.98 yr)      first obs. used      1990-09-25      last obs. used      2020-09-16      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .42701      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 19:32:11   Additional Information  Earth MOID = .0485323 au   Jupiter MOID = 2.10399 au   T_jup = 3.697  [ 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 16.91   n/a E2021B55   diameter diameter 2 km n/a n/a Radar observed triple system with estimated diameters of 2, 1 and 0.4 km rotation period rot_per 3.423 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Oey, J. (2009) Minor Planet Bull. 36, 4-6.] [Warner, B.D. (2011) http://www.minorplanetobserver.com/PDO/PDOLightcurves.htm] [Becker, T.M.; Howell, E.S.; Nolan, M.C.; Magri, C.; et al. (2015) Icarus 248, 499-515.] 153591 (2001 SN263)          Discovered 2001-Sep-20 by LINEAR at Socorro Reference: 20070402/Numbers.arc Last Updated: 2007-04-04 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-16 03:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin