+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   3431 Nakano (1984 QC) Classification: Main-belt Asteroid          SPK-ID: 2003431 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .04786790991877633 5.5114e-08   a 3.093176223745307 1.6027e-08 au q 2.945112342904166 1.7171e-07 au i 12.28154096425483 4.679e-06 deg node 312.340070200423 2.1801e-05 deg peri 45.494075274 4.647e-05 deg M 188.9715726127153 4.2005e-05 deg tp 2459944.498324227633 (2022-Dec-30.99832423) 0.00023406 TDB period 1987.034564449336 5.44 1.5444e-05 4.228e-08 d yr n .1811745031721511 1.4081e-09 deg/d Q 3.241240104586449 1.6794e-08 au   Orbit Determination Parameters    # obs. used (total)      2613      data-arc span      23876 days (65.37 yr)      first obs. used      1955-03-24      last obs. used      2020-08-05      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43222      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 23:03:34   Additional Information  Earth MOID = 1.95057 au   Jupiter MOID = 2.07773 au   T_jup = 3.187  [ 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 10.6   n/a MPO384782   diameter diameter 44.339 km 0.142 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 9.0563 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Warner, B.D. (2003) Minor Planet Bull. 30, 61-64.] [Warner, B.D. (2011) Minor Planet Bull. 38, 21-23.] [Brincat, S. (2017) Posting on CALL web site: http://www.minorplanet.info/call.html.] [Brincat, S.M.; Baldies, C. (2018) Minor Planet Bull. 45, 244-245.] geometric albedo albedo 0.050   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   3431 Nakano (1984 QC)          Discovered 1984-Aug-24 by Seki, T. at Geisei Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1984 QC = 1951 PL = 1962 PD = 1962 QM = 1970 AO = 1973 SD2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-17 20:22 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin