+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2064 Thomsen (1942 RQ) Classification: Mars-crossing Asteroid          SPK-ID: 2002064 [ 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 .3297883756908409 2.3145e-08   a 2.178951018169098 3.7541e-09 au q 1.460358301177207 5.0605e-08 au i 5.695748283075836 1.5512e-06 deg node 302.1411412900497 8.5507e-06 deg peri 2.744754729707893 9.6084e-06 deg M 150.1686677915453 1.9408e-06 deg tp 2458710.443159738579 (2019-Aug-14.94315974) 5.6025e-06 TDB period 1174.815393175142 3.22 3.0361e-06 8.312e-09 d yr n .3064311227886091 7.9192e-10 deg/d Q 2.897543735160989 4.9921e-09 au   Orbit Determination Parameters    # obs. used (total)      3453      data-arc span      28677 days (78.51 yr)      first obs. used      1942-09-08      last obs. used      2021-03-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .38004      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 13:18:04   Additional Information  Earth MOID = .443259 au   Jupiter MOID = 2.36911 au   T_jup = 3.604  [ 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 12.67   n/a E2021B10   diameter diameter 13.61 km 1.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2 rotation period rot_per 4.233 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Wisniewski, W.Z. (1991) Icarus 90, 117-122.] [Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Warner, B.D. (2015) Minor Planet Bull. 42, 167-172.] [Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.] [Warner, B.D. (2017) Minor Planet Bull. 44, 116-120.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] geometric albedo albedo 0.0549   0.015 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2 B-V BV 0.887   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=10.61 deg. U-B UB 0.524   0.039 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=10.61 deg. SMASSII spectral type spec_B S   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) 2064 Thomsen (1942 RQ)          Discovered 1942-Sep-08 by Oterma, L. at Turku Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1942 RQ = 1958 RO = 1974 OK = 1977 FE3 = 1977 KA = A913 QB  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 02:54 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin