+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2280 Kunikov (1971 SL2) Classification: Main-belt Asteroid          SPK-ID: 2002280 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 48 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1407910279097639 1.7783e-08   a 2.17914490815271 5.0007e-09 au q 1.872340856569562 3.949e-08 au i 3.568951481495807 1.703e-07 deg node 106.4837542372073 7.3676e-06 deg peri 264.3791000493145 8.1205e-06 deg M 104.8922857177913 5.6495e-06 deg tp 2458858.151332711366 (2020-Jan-09.65133271) 1.808e-05 TDB period 1174.972204872109 3.22 4.0445e-06 1.107e-08 d yr n .3063902265153452 1.0547e-09 deg/d Q 2.485948959735858 5.7048e-09 au   Orbit Determination Parameters    # obs. used (total)      2934      data-arc span      23338 days (63.90 yr)      first obs. used      1957-04-28      last obs. used      2021-03-21      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47073      source      ORB      producer      Otto Matic      solution date      2021-May-03 20:07:13   Additional Information  Earth MOID = .874518 au   Jupiter MOID = 2.98083 au   T_jup = 3.667  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.39   n/a MPCxxxxx   diameter diameter 6.140 km 0.142 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 21.45 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Linville, D.; Jiang, H.; Michalik, D.; Wilson, S.; Ditteon, R. (2017) Minor Planet Bull. 44, 173-176.] geometric albedo albedo 0.270   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   SMASSII spectral type spec_B Sa   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 2280 Kunikov           Discovered 1971 Sept. 26 by T. M. Smirnova at the Crimean Astrophysical Observatory. Named in memory of Tzezar' L´vovich Kunikov (1909-1943), commander of the landing party that seized Malaya Zemlya in the Novorossijsk region in February 1943. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC 6059 Last Updated: 2006-03-21 Alternate Designations  1971 SL2 = 1970 GY1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-May-08 20:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin