+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   227809 (2007 BA38) Classification: Main-belt Asteroid          SPK-ID: 2227809 [ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1201116870486792 4.6074e-08   a 2.298993067828282 1.0055e-08 au q 2.022857131938208 1.054e-07 au i 2.879147395814461 6.4557e-06 deg node 151.5759901663716 8.311e-05 deg peri 298.5281314919201 8.8507e-05 deg M 22.41792391821368 2.7777e-05 deg tp 2459121.213762392909 (2020-Sep-28.71376239) 9.8145e-05 TDB period 1273.224302245166 3.49 8.3532e-06 2.287e-08 d yr n .2827467237038963 1.855e-09 deg/d Q 2.575129003718355 1.1263e-08 au   Orbit Determination Parameters    # obs. used (total)      362      data-arc span      6707 days (18.36 yr)      first obs. used      2002-10-31      last obs. used      2021-03-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .54987      source      ORB      producer      Otto Matic      solution date      2021-Apr-14 00:41:15   Additional Information  Earth MOID = 1.04101 au   Jupiter MOID = 2.58449 au   T_jup = 3.581  [ 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 17.3   n/a MPO450054   diameter diameter 1.717 km 0.244 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.072   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   227809 (2007 BA38)          Discovered 2007-Jan-24 by Mt. Lemmon Survey at Mount Lemmon Reference: 20091202/Numbers.arc Last Updated: 2009-12-04 [ show close-approach data ] Alternate Designations  2007 BA38 = 2004 GU57  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-17 03:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin