+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2774 Tenojoki (1942 TJ) Classification: Main-belt Asteroid          SPK-ID: 2002774 [ 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 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1403353992111017 3.5971e-08   a 3.184879895748487 1.7508e-08 au q 2.737928504139211 1.1488e-07 au i 8.528166139951862 4.0505e-06 deg node 290.9343883327692 2.7204e-05 deg peri 108.0595245425792 3.1117e-05 deg M 214.6873060069882 1.6737e-05 deg tp 2459838.490450502067 (2022-Sep-15.99045050) 0.00010027 TDB period 2076.050989703982 5.68 1.7118e-05 4.687e-08 d yr n .1734061455067302 1.4298e-09 deg/d Q 3.631831287357763 1.9964e-08 au   Orbit Determination Parameters    # obs. used (total)      2421      data-arc span      28521 days (78.09 yr)      first obs. used      1942-09-08      last obs. used      2020-10-09      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42779      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:06:11   Additional Information  Earth MOID = 1.76149 au   Jupiter MOID = 1.83576 au   T_jup = 3.166  [ 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 11.3   n/a MPO347542   diameter diameter 35.697 km 0.386 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 11.2 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. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] geometric albedo albedo 0.033   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   2774 Tenojoki (1942 TJ)          Discovered 1942-Oct-03 by Oterma, L. at Turku Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1942 TJ = 1948 TO1 = 1981 LE = 2000 XO55  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-23 16:14 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin