+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   227271 (2005 SK128) Classification: Main-belt Asteroid          SPK-ID: 2227271 [ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2005343952111192 8.8347e-08   a 2.429367135592901 1.1334e-08 au q 1.942195466311009 2.177e-07 au i 1.15660552279471 8.7047e-06 deg node 168.3821516670367 0.0001951 deg peri 155.2142068320433 0.00019597 deg M 40.94186537994384 1.4281e-05 deg tp 2459043.209214902153 (2020-Jul-12.70921490) 5.534e-05 TDB period 1383.050872493068 3.79 9.679e-06 2.65e-08 d yr n .2602941129353175 1.8216e-09 deg/d Q 2.916538804874792 1.3607e-08 au   Orbit Determination Parameters    # obs. used (total)      243      data-arc span      7061 days (19.33 yr)      first obs. used      2001-08-16      last obs. used      2020-12-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .57225      source      ORB      producer      Otto Matic      solution date      2021-Apr-14 00:39:07   Additional Information  Earth MOID = .928067 au   Jupiter MOID = 2.41164 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 17.57   n/a E2021B55   227271 (2005 SK128)          Discovered 2005-Sep-29 by Mt. Lemmon Survey at Mount Lemmon Reference: 20091202/Numbers.arc Last Updated: 2009-12-04 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-23 18:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin