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192221 (2007 RQ278)
Classification: Jupiter Trojan          SPK-ID: 2192221
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0468375519424245 7.1069e-08  
a 5.191320803335115 1.8614e-07 au
q 4.948172045559118 4.5028e-07 au
i 27.34826471169403 6.3544e-06 deg
node 106.8428222841026 1.3523e-05 deg
peri 225.4266392666119 8.1226e-05 deg
M 42.41883984674459 7.602e-05 deg
tp 2458691.437022182954
(2019-Jul-26.93702218)
0.00092517 TDB
period 4320.313159818794
11.83
0.00023237
6.362e-07
d
yr
n .0833272928796438 4.4818e-09 deg/d
Q 5.434469561111112 1.9486e-07 au
  Orbit Determination Parameters
   # obs. used (total)      422  
   data-arc span      8004 days (21.91 yr)  
   first obs. used      1998-12-19  
   last obs. used      2020-11-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58359  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 22:15:12  

Additional Information
 Earth MOID = 3.96848 au 
 Jupiter MOID = .141504 au 
 T_jup = 2.775 
[ 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 12.36   n/a MPCxxxxx  
diameter diameter 21.404 km 0.707 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.051   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

192221 (2007 RQ278)          Discovered 2007-Sep-05 by Siding Spring Survey at Siding Spring
Reference: 20080917/Numbers.arcLast Updated: 2008-09-19

Alternate Designations
 2007 RQ278 = 2004 HB54 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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