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487700 (2015 RR21)
Classification: Main-belt Asteroid          SPK-ID: 2487700
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2690449734307146 5.2482e-08  
a 2.654790457808455 5.3412e-08 au
q 1.940532429623265 1.3014e-07 au
i 6.230121884689476 1.0985e-05 deg
node 194.1094933786574 6.3878e-05 deg
peri 256.0852629752336 6.8526e-05 deg
M 317.7182256666976 2.7636e-05 deg
tp 2459186.064331769570
(2020-Dec-02.56433177)
0.00012457 TDB
period 1579.95165743149
4.33
4.7681e-05
1.305e-07
d
yr
n .2278550728477655 6.8764e-09 deg/d
Q 3.369048485993645 6.7782e-08 au
  Orbit Determination Parameters
   # obs. used (total)      106  
   data-arc span      3327 days (9.11 yr)  
   first obs. used      2011-09-21  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57629  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 02:25:18  

Additional Information
 Earth MOID = .968024 au 
 Jupiter MOID = 1.9091 au 
 T_jup = 3.328 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457656.5 (2016-Sep-25.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2658701922191461 5.2274e-08  
q 1.950821570033992 1.2947e-07 au
tp 2457602.955947125691
(2016-Aug-02.45594713)
0.00010624 TDB
node 194.2070541844699 6.3663e-05 deg
peri 255.7851310061695 6.8543e-05 deg
i 6.233058555970067 1.1003e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      106  
   data-arc span      3327 days (9.11 yr)  
   first obs. used      2011-09-21  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57629  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 02:25:18  

Additional Information
 Jupiter MOID = 1.9091 au 
 T_jup = 3.328 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.732546703195672E-15 -6.486637727102034E-15 3.040549085771486E-12 -3.260799132233456E-14 7.087106587059192E-13 1.462231639860938E-15
q -6.486637727102034E-15 1.676148540670909E-14 -7.006627544122997E-12 7.665238907846114E-14 -1.629234949397155E-12 -1.762001194433427E-15
tp 3.040549085771486E-12 -7.006627544122997E-12 1.128770466833695E-8 -8.256158110615299E-11 2.75640224708468E-9 -4.845237348583419E-12
node -3.260799132233456E-14 7.665238907846114E-14 -8.256158110615299E-11 4.052988275637251E-9 -4.047658736640986E-9 -4.416393544028943E-10
peri 7.087106587059192E-13 -1.629234949397155E-12 2.75640224708468E-9 -4.047658736640986E-9 4.698161081377231E-9 4.378529961239925E-10
i 1.462231639860938E-15 -1.762001194433427E-15 -4.845237348583419E-12 -4.416393544028943E-10 4.378529961239925E-10 1.210655742462327E-10

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 17.0   n/a MPO495391  

487700 (2015 RR21)          Discovered 2011-Sep-21 by Spacewatch at Kitt Peak
Reference: Last Updated: 2017-03-14

[ 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
1984-Feb-04 05:34 00:03 Jupiter 1.95135015307309 1.95134932008627 1.95135098607255 1.24175993206533 0.820870132934263 2445734.731844835 2.90896648583795 749.492833612062 198.557008215347 30.4731035939784 1708472.00073715 T 16 CATAB v2.0f-lin.ifort 2020-Nov-12 02:25:19 2020-Nov-12 02:25
2031-Nov-04 21:24 00:01 Jupiter 1.91398050723175 1.91397961343837 1.91398140123784 1.02662627872649 0.410939780729049 2463175.391696417 1.35343748542229 5513.28416494274 685.745530241837 30.3965519259053 3446813.59397934 T 16 CATAB v2.0f-lin.ifort 2020-Nov-12 02:25:19 2020-Nov-12 02:25
2079-Aug-04 14:10 00:06 Jupiter 1.90211695121691 1.90211605718669 1.90211784524815 0.941339803801046 n/a 2480615.090147619 5.61562163698222 186.538980264858 41.1649363815 84.6017556091541 6881597.31405909 F 16 CATAB v2.0f-lin.ifort 2020-Nov-12 02:25:19 2020-Nov-12 02:25
2127-May-05 19:31 00:10 Jupiter 1.91267530764613 1.91267390194799 1.91267671461171 1.03767912551474 0.437131529366323 2498055.313139665 10.0475977766765 12905.1210505728 937.870431534331 22.0131041300019 1241728.78769159 T 16 CATAB v2.0f-lin.ifort 2020-Nov-12 02:25:19 2020-Nov-12 02:25
2175-Feb-06 05:17 00:15 Jupiter 1.94795176318073 1.94794788996781 1.94795563627395 1.32982228347301 0.948036285132895 2515498.720305976 14.57029321551 3048.20421398383 345.42809362512 -3.14417412042186 121987.931717795 T 16 CATAB v2.0f-lin.ifort 2020-Nov-12 02:25:19 2020-Nov-12 02:25

Alternate Designations
 2015 RR21 = 2011 UM220 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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