+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   19901 (2191 T-3) Classification: Main-belt Asteroid          SPK-ID: 2019901 [ 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 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .109062522712258 3.5558e-08   a 2.75155789610838 1.3114e-08 au q 2.451466050569967 9.8574e-08 au i 3.943243751513505 4.951e-06 deg node 342.5383773183841 5.457e-05 deg peri 115.8387147777296 6.0993e-05 deg M 95.40672438502483 2.4286e-05 deg tp 2458758.682519742259 (2019-Oct-02.18251974) 0.00011285 TDB period 1667.118265699018 4.56 1.1918e-05 3.263e-08 d yr n .2159414886196169 1.5438e-09 deg/d Q 3.051649741646793 1.4544e-08 au   Orbit Determination Parameters    # obs. used (total)      871      data-arc span      15585 days (42.67 yr)      first obs. used      1977-10-07      last obs. used      2020-06-08      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .53308      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:08:41   Additional Information  Earth MOID = 1.47127 au   Jupiter MOID = 2.08295 au   T_jup = 3.333  [ 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 15.33   n/a E2021B10   diameter diameter 4.620 km 0.260 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.043   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   19901 (2191 T-3)          Discovered 1977-Oct-16 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar Reference: 20001211/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  2191 T-3 = 1995 SV11  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-18 00:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin