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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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2690449600683544 5.7233e-08  
a 2.654790438230013 6.3028e-08 au
q 1.94053245078657 1.3509e-07 au
i 6.23012307477378 1.1706e-05 deg
node 194.1094983451168 6.5268e-05 deg
peri 256.0852541556549 7.114e-05 deg
M 317.7182277564685 3.2867e-05 deg
tp 2459186.064320545340
(2020-Dec-02.56432055)
0.0001487 TDB
period 1579.951639953844
4.33
5.6265e-05
1.54e-07
d
yr
n .2278550753683302 8.1144e-09 deg/d
Q 3.369048425673456 7.9985e-08 au
  Orbit Determination Parameters
   # obs. used (total)      99  
   data-arc span      2892 days (7.92 yr)  
   first obs. used      2011-09-21  
   last obs. used      2019-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59432  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 08:19:37  

Additional Information
 Earth MOID = .968024 au 
 Jupiter MOID = 1.9091 au 
 T_jup = 3.328 
[ 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 17.0   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 1.95135010189568 1.95134920033793 1.95135100346818 1.24175972279039 0.82086980248798 2445734.732120872 3.43478282213832 803.468425059002 211.549084140669 30.1451919707578 1568304.07731047 T 15 CATAB v2.0f-lin.ifort 2019-Sep-24 08:19:38 2019-Sep-24 08:19
2031-Nov-04 21:24 00:02 Jupiter 1.91398060112285 1.91397958417501 1.91398161840491 1.026626654915 0.410940773365519 2463175.391636688 1.5789603504458 6322.66183084213 715.753637241409 30.968235284321 3365409.75884272 T 15 CATAB v2.0f-lin.ifort 2019-Sep-24 08:19:38 2019-Sep-24 08:19
2079-Aug-04 14:09 00:07 Jupiter 1.9021170409146 1.90211603865664 1.90211804317472 0.941340090782667 n/a 2480615.089714331 6.6050404882296 212.717056511793 43.618851442622 83.2702385298438 6478921.14980693 F 15 CATAB v2.0f-lin.ifort 2019-Sep-24 08:19:38 2019-Sep-24 08:19
2127-May-05 19:30 00:12 Jupiter 1.91267524006849 1.91267372538277 1.91267675635843 1.03767801527454 0.437128858036558 2498055.312342607 11.8226420180749 14489.7299666521 980.625254858465 22.177935268502 1195003.64625359 T 15 CATAB v2.0f-lin.ifort 2019-Sep-24 08:19:38 2019-Sep-24 08:19
2175-Feb-06 05:16 00:17 Jupiter 1.94795138492544 1.94794696096308 1.94795580873034 1.32981876730866 0.948031263895392 2515498.719133555 17.1423942748475 3526.31339034614 364.074248391953 -3.27936029433335 107765.894685397 T 15 CATAB v2.0f-lin.ifort 2019-Sep-24 08:19:38 2019-Sep-24 08:19

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