+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   6631 Pyatnitskij (1983 RQ4) Classification: Main-belt Asteroid          SPK-ID: 2006631 [ 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 37 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1501653346714375 2.8346e-08   a 2.468061585448144 7.8659e-09 au q 2.097444291479605 7.0175e-08 au i 7.140477120152364 4.098e-06 deg node 192.1136129531416 2.9068e-05 deg peri 205.7910145786859 3.3014e-05 deg M 172.4851739395623 1.6033e-05 deg tp 2458521.950264200360 (2019-Feb-07.45026420) 6.2395e-05 TDB period 1416.225518452176 3.88 6.7704e-06 1.854e-08 d yr n .2541968036230924 1.2152e-09 deg/d Q 2.838678879416684 9.047e-09 au   Orbit Determination Parameters    # obs. used (total)      2637      data-arc span      25980 days (71.13 yr)      first obs. used      1949-11-30      last obs. used      2021-01-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42836      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 19:07:53   Additional Information  Earth MOID = 1.10567 au   Jupiter MOID = 2.58744 au   T_jup = 3.460  [ 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 13.29   n/a E2021B10   diameter diameter 14.336 km 0.060 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.044   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   6631 Pyatnitskij (1983 RQ4)          Discovered 1983-Sep-04 by Zhuravleva, L. V. at Nauchnyj Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1983 RQ4 = 1987 SR  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-04 23:15 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin