+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1841 Masaryk (1971 UO1) Classification: Outer Main-belt Asteroid          SPK-ID: 2001841 [ 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 53 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1019422850203659 2.9417e-08   a 3.433353390157919 1.4929e-08 au q 3.083349500282801 9.8703e-08 au i 2.60995018583177 3.1427e-06 deg node 45.14421012647601 7.2851e-05 deg peri 122.150340542127 7.4491e-05 deg M 106.9106107810467 1.6147e-05 deg tp 2458310.427854959655 (2018-Jul-10.92785496) 0.00010339 TDB period 2323.679290573893 6.36 1.5156e-05 4.149e-08 d yr n .1549267153433591 1.0105e-09 deg/d Q 3.783357280033037 1.6451e-08 au   Orbit Determination Parameters    # obs. used (total)      3101      data-arc span      30918 days (84.65 yr)      first obs. used      1936-03-23      last obs. used      2020-11-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46445      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:02:59   Additional Information  Earth MOID = 2.09113 au   Jupiter MOID = 1.18715 au   T_jup = 3.130  [ 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 10.9   n/a MPO492772   diameter diameter 40.240 km 0.504 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 7.53 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.] geometric albedo albedo 0.052   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   1841 Masaryk (1971 UO1)          Discovered 1971-Oct-26 by Kohoutek, L. at Bergedorf Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1971 UO1 = 1936 FW = 1955 DE = 1959 VJ = 1968 FG = 1970 QN  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-28 06:42 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin