+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   3189 Penza (1978 RF6) Classification: Main-belt Asteroid          SPK-ID: 2003189 [ 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 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1980804178577664 4.0642e-08   a 3.094784334353094 1.6321e-08 au q 2.481768160224764 1.2905e-07 au i 8.225436115862403 4.2344e-06 deg node 177.5355101808426 2.5153e-05 deg peri 189.6898848254543 2.6559e-05 deg M 231.2988246652561 1.0447e-05 deg tp 2459711.425388261891 (2022-May-11.92538826) 6.1144e-05 TDB period 1988.584324180525 5.44 1.5731e-05 4.307e-08 d yr n .1810333087827957 1.432e-09 deg/d Q 3.707800508481425 1.9553e-08 au   Orbit Determination Parameters    # obs. used (total)      2114      data-arc span      23318 days (63.84 yr)      first obs. used      1956-11-03      last obs. used      2020-09-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48107      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:02:24   Additional Information  Earth MOID = 1.48085 au   Jupiter MOID = 1.75331 au   T_jup = 3.178  [ 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 12.8   n/a MPO435728   diameter diameter 10.707 km 1.998 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)   geometric albedo albedo 0.136   0.067 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)   3189 Penza (1978 RF6)          Discovered 1978-Sep-13 by Chernykh, N. at Nauchnyj Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1978 RF6 = 1981 EE25  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-26 13:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin