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52777 (1998 QR21)
Classification: Main-belt Asteroid          SPK-ID: 2052777
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1216739751549338 2.7372e-08  
a 2.183916532374872 7.7013e-09 au
q 1.918190726474243 5.899e-08 au
i 5.693440239905735 5.4965e-06 deg
node 328.5228685173902 2.959e-05 deg
peri 97.85345454345639 3.7677e-05 deg
M 187.5496420372135 2.234e-05 deg
tp 2459565.195179235141
(2021-Dec-16.69517924)
7.3379e-05 TDB
period 1178.833531725805
3.23
6.2355e-06
1.707e-08
d
yr
n .305386630352262 1.6154e-09 deg/d
Q 2.449642338275502 8.6383e-09 au
  Orbit Determination Parameters
   # obs. used (total)      917  
   data-arc span      7583 days (20.76 yr)  
   first obs. used      1998-08-17  
   last obs. used      2019-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55562  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 03:07:41  

Additional Information
 Earth MOID = .941782 au 
 Jupiter MOID = 2.79988 au 
 T_jup = 3.662 
[ 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 15.6   n/a MPO474412  

52777 (1998 QR21)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20030216/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 QR21 = 2000 EG75 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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