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21157 (1993 RC5)
Classification: Outer Main-belt Asteroid          SPK-ID: 2021157
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1004459063774183 3.2514e-08  
a 3.202663903422316 1.7123e-08 au
q 2.880969424820821 1.0924e-07 au
i 2.898967413646489 3.4963e-06 deg
node 212.4122746435607 7.2406e-05 deg
peri 176.1208570385622 7.4677e-05 deg
M 293.4497572878903 1.9427e-05 deg
tp 2459783.501472317471
(2022-Jul-23.00147232)
0.00011437 TDB
period 2093.463890687482
5.73
1.6789e-05
4.597e-08
d
yr
n .1719637972268908 1.3791e-09 deg/d
Q 3.524358382023811 1.8843e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1434  
   data-arc span      10190 days (27.90 yr)  
   first obs. used      1993-09-15  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5347  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:40:58  

Additional Information
 Earth MOID = 1.88508 au 
 Jupiter MOID = 1.90771 au 
 T_jup = 3.184 
[ 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 13.88   n/a MPO636382  

21157 (1993 RC5)          Discovered 1993-Sep-15 by Elst, E. W. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ 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
1911-Jan-09 21:38 00:02 Jupiter 1.9987611037056 1.99876070187348 1.99876150553851 3.09501114498153 2.95491902844854 2419046.401452973 2.31519640789872 106.202254544343 11.1712304599196 84.0968988871301 4628120.00505919 T 25 CATAB v2.0g-lin.ifort 2021-Aug-24 22:41:03 2021-Aug-24 22:41
2032-Oct-18 02:14 < 00:01 Jupiter 1.97687750068651 1.97687716131438 1.97687784005863 3.62447514502115 3.50426745378702 2463523.592962366 0.464727243921995 32.4640531163871 13.1378814889876 -81.2809259751219 4797063.76178393 T 25 CATAB v2.0g-lin.ifort 2021-Aug-24 22:41:03 2021-Aug-24 22:41
2043-Nov-12 07:34 < 00:01 Jupiter 1.95372805617387 1.95372774291429 1.95372836943333 3.30498021742361 3.17108986169432 2467565.814933973 0.733388581733302 32.6004864512387 11.7411709391642 -84.0356883217374 4870595.70842955 T 25 CATAB v2.0g-lin.ifort 2021-Aug-24 22:41:03 2021-Aug-24 22:41
2054-Dec-17 23:56 00:01 Jupiter 1.94653436269473 1.94653406519242 1.94653466019705 3.12986319273319 2.98760034966902 2471619.497083132 1.01251335841762 39.9013837519384 11.161354373794 89.8672816088038 4863152.96896298 T 25 CATAB v2.0g-lin.ifort 2021-Aug-24 22:41:03 2021-Aug-24 22:41
2066-Jan-31 04:52 00:01 Jupiter 1.96209134429375 1.9620910285645 1.96209166002299 3.07629662484234 2.93261205826643 2475681.702754874 1.30367223743217 56.9227857865386 11.151379861101 85.5136714748328 4732117.13368143 T 25 CATAB v2.0g-lin.ifort 2021-Aug-24 22:41:03 2021-Aug-24 22:41
2187-Dec-16 16:03 00:05 Jupiter 1.98547870921451 1.98547818726006 1.98547923117336 3.96613233687468 3.85706991035185 2520195.168915944 4.62725618895848 212.08490039486 15.2783942092562 86.9552959728183 4453663.65527967 T 25 CATAB v2.0g-lin.ifort 2021-Aug-24 22:41:03 2021-Aug-24 22:41
2199-Jan-01 14:53 00:05 Jupiter 1.94213251901355 1.94213209026467 1.94213294776364 3.48111593622031 3.35349189624461 2524229.120449761 4.8035854062829 139.552838024077 13.5011800853233 88.7541319731699 4214134.35819534 T 25 CATAB v2.0g-lin.ifort 2021-Aug-24 22:41:03 2021-Aug-24 22:41

Alternate Designations
 1993 RC5 = 1999 VL54 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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