+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   27646 (2266 T-2) Classification: Main-belt Asteroid          SPK-ID: 2027646 [ 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 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .03684429567750074 4.2006e-08   a 2.329160066199218 7.3979e-09 au q 2.243343804039947 9.8854e-08 au i 5.523910473526367 5.6319e-06 deg node 173.664521895423 3.2868e-05 deg peri 130.0000944506383 7.6744e-05 deg M 106.8720663184734 6.838e-05 deg tp 2458615.057911712127 (2019-May-11.55791171) 0.00024711 TDB period 1298.366884477924 3.55 6.1859e-06 1.694e-08 d yr n .2772713970941709 1.321e-09 deg/d Q 2.41497632835849 7.6705e-09 au   Orbit Determination Parameters    # obs. used (total)      1122      data-arc span      16926 days (46.34 yr)      first obs. used      1973-09-20      last obs. used      2020-01-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56396      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 01:07:50   Additional Information  Earth MOID = 1.23317 au   Jupiter MOID = 2.64648 au   T_jup = 3.565  [ 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 15.3   n/a MPO502364   diameter diameter 2.393 km 0.191 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.308   0.061 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   27646 (2266 T-2)          Discovered 1973-Sep-29 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar Reference: 20010804/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  2266 T-2 = 1998 SO72  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-03 19:01 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin