+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   22759 (1998 XA4) Classification: Main-belt Asteroid          SPK-ID: 2022759 [ 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 41 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1804603103480141 1.5749e-08   a 2.385301211785402 6.4806e-09 au q 1.954849014833114 3.7219e-08 au i 8.196512285833442 7.4577e-07 deg node 48.64728324710564 5.7299e-06 deg peri 335.4230755877809 5.9457e-06 deg M 30.17743107785359 3.8006e-06 deg tp 2459087.704172152495 (2020-Aug-26.20417215) 1.4149e-05 TDB period 1345.591608521701 3.68 5.4838e-06 1.501e-08 d yr n .2675403129152273 1.0903e-09 deg/d Q 2.81575340873769 7.6501e-09 au   Orbit Determination Parameters    # obs. used (total)      2387      data-arc span      21644 days (59.26 yr)      first obs. used      1961-12-03      last obs. used      2021-03-07      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .40791      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 04:11:32   Additional Information  Earth MOID = .961298 au   Jupiter MOID = 2.6382 au   T_jup = 3.500  [ 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 13.6   n/a MPO492987   diameter diameter 5.287 km 0.068 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.277   0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   22759 (1998 XA4)          Discovered 1998-Dec-11 by Kobayashi, T. at Oizumi Reference: 20010309/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 XA4 = 1961 XD = 1972 TM8  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-23 02:59 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin