+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   359744 (2011 UN61) Classification: Main-belt Asteroid          SPK-ID: 2359744 [ 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 8 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09311446648966318 4.137e-08   a 2.631506652711996 2.1329e-08 au q 2.38647531468072 1.1303e-07 au i 2.053348022175911 5.1914e-06 deg node 113.2517651347843 0.00019671 deg peri 332.5060726561582 0.00020418 deg M 26.79629788645245 5.2306e-05 deg tp 2459084.441372156507 (2020-Aug-22.94137216) 0.00022617 TDB period 1559.211880712111 4.27 1.8957e-05 5.19e-08 d yr n .230885875392114 2.8071e-09 deg/d Q 2.876537990743274 2.3315e-08 au   Orbit Determination Parameters    # obs. used (total)      156      data-arc span      6185 days (16.93 yr)      first obs. used      2004-02-12      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .63846      source      ORB      producer      Otto Matic      solution date      2021-Feb-23 23:48:49   Additional Information  Earth MOID = 1.40262 au   Jupiter MOID = 2.28346 au   T_jup = 3.393  [ 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 17.2   n/a MPO494870   359744 (2011 UN61)          Discovered 2007-Nov-05 by Mt. Lemmon Survey at Mount Lemmon Reference: 20130327/Numbers.arc Last Updated: 2013-03-29 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 1923-Apr-09 16:25 00:23 Amphi 0.0253617498766722 0.0253571048308866 0.0253665485781571 2.40495790186793 2.40495780761685 2423519.184167570 23.2429799325376 3311.52875768879 79.4690649899963 -86.1656275071107 47567.8903892918 T 8 CATAB v2.0f-lin.ifort 2021-Feb-23 23:48:51 2021-Feb-23 23:48 1967-Aug-08 15:27 00:11 Hygie 0.0313750452037588 0.0313389209012746 0.0314111752116078 3.1530036013907 3.15300321082543 2439711.143507353 11.4683371333564 1916.8382592822 102.870533087784 -20.410192827669 16028.7539163011 T 8 CATAB v2.0f-lin.ifort 2021-Feb-23 23:48:51 2021-Feb-23 23:48 2017-Feb-28 21:51 00:03 Amphi 0.0282170531363534 0.028215549426661 0.0282185572747483 2.41382766740666 2.4138275830042 2457813.410190924 3.36456973365329 351.580967237289 64.6760557230312 -83.7252188066434 64797.5297857734 T 8 CATAB v2.0f-lin.ifort 2021-Feb-23 23:48:51 2021-Feb-23 23:48 2095-Aug-27 12:06 00:16 Hygie 0.0301196618194623 0.0300753891193674 0.0301639464477766 3.23021747530424 3.2302170781853 2486482.004482132 16.3033338623706 2396.81001055787 107.126758297672 23.2463142402112 16643.2559932977 T 8 CATAB v2.0f-lin.ifort 2021-Feb-23 23:48:51 2021-Feb-23 23:48 2111-Jan-19 14:28 00:30 Amphi 0.0310797071476091 0.0310656133264763 0.0310939998802636 2.43077908210392 2.43077900600988 2492105.102767868 29.8114126802624 3997.38630030404 69.4226203913249 79.8654955928249 65836.8215683399 T 8 CATAB v2.0f-lin.ifort 2021-Feb-23 23:48:51 2021-Feb-23 23:48 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-24 18:18 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin