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70387 (1999 RW221)
Classification: Main-belt Asteroid          SPK-ID: 2070387
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1529618158042525 2.9806e-08  
a 2.305863429241264 6.8905e-09 au
q 1.9531543721079 6.7516e-08 au
i 2.128452893161473 4.266e-06 deg
node 318.8406705742067 7.981e-05 deg
peri 308.5789913972204 8.1157e-05 deg
M 72.95960546438035 1.3444e-05 deg
tp 2458941.303713453229
(2020-Apr-01.80371345)
4.7813e-05 TDB
period 1278.935961384727
3.50
5.7326e-06
1.57e-08
d
yr
n .2814839920602604 1.2617e-09 deg/d
Q 2.658572486374629 7.9444e-09 au
  Orbit Determination Parameters
   # obs. used (total)      841  
   data-arc span      7820 days (21.41 yr)  
   first obs. used      1999-07-13  
   last obs. used      2020-12-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56084  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:49:24  

Additional Information
 Earth MOID = .936253 au 
 Jupiter MOID = 2.42533 au 
 T_jup = 3.571 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.27   n/a E2021B10  

70387 (1999 RW221)          Discovered 1999-Sep-06 by Spacewatch at Kitt Peak
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RW221 = 1999 NJ12 = 2002 GB19 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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