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JPL Small-Body Database Browser
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379962 (2012 QZ21)
Classification: Main-belt Asteroid          SPK-ID: 2379962
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1780698548276736 5.1768e-08  
a 3.098597682167862 4.8523e-08 au
q 2.546830842734864 1.6273e-07 au
i 4.743068971969009 5.8991e-06 deg
node 292.5905203904508 9.3034e-05 deg
peri 309.5893518891808 9.5906e-05 deg
M 238.9154938320164 2.3247e-05 deg
tp 2459670.588691055883
(2022-Apr-01.08869106)
0.00013505 TDB
period 1992.260912766583
5.45
4.6797e-05
1.281e-07
d
yr
n .1806992235269429 4.2446e-09 deg/d
Q 3.650364521600859 5.7164e-08 au
  Orbit Determination Parameters
   # obs. used (total)      231  
   data-arc span      5049 days (13.82 yr)  
   first obs. used      2005-03-08  
   last obs. used      2019-01-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57874  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 14:44:52  

Additional Information
 Earth MOID = 1.53727 au 
 Jupiter MOID = 1.41898 au 
 T_jup = 3.193 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457284.5 (2015-Sep-19.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1795445226467204 5.1789e-08  
q 2.54310680994794 1.6353e-07 au
tp 2457676.604158924192
(2016-Oct-15.10415892)
0.00011959 TDB
node 292.7068482166381 9.2923e-05 deg
peri 309.0898441475488 9.5731e-05 deg
i 4.746360244687946 5.9048e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      231  
   data-arc span      5049 days (13.82 yr)  
   first obs. used      2005-03-08  
   last obs. used      2019-01-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57874  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 14:44:52  

Additional Information
 Jupiter MOID = 1.41898 au 
 T_jup = 3.193 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.682089363538889E-15 -8.214220370117325E-15 -2.185567441911282E-12 -1.040693386893197E-14 -4.168381158677233E-13 -3.970788560898807E-15
q -8.214220370117325E-15 2.67422579204282E-14 7.484877688003543E-12 4.178108941008264E-14 1.347864848519954E-12 1.356089963368448E-14
tp -2.185567441911282E-12 7.484877688003543E-12 1.430131581777405E-8 3.289203842315106E-11 2.837992389576738E-9 1.042234344399494E-11
node -1.040693386893197E-14 4.178108941008264E-14 3.289203842315106E-11 8.634763032151926E-9 -8.599182396180568E-9 1.673451509863672E-10
peri -4.168381158677233E-13 1.347864848519954E-12 2.837992389576738E-9 -8.599182396180568E-9 9.164331685342772E-9 -1.647680895576797E-10
i -3.970788560898807E-15 1.356089963368448E-14 1.042234344399494E-11 1.673451509863672E-10 -1.647680895576797E-10 3.48671328447418E-11

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 15.7   n/a MPO418934  
diameter diameter 2.862 km 0.989 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.028   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

379962 (2012 QZ21)          Discovered 2005-Mar-08 by Spacewatch at Kitt Peak
Reference: Last Updated: 2013-11-20

[ show close-approach data ]
Alternate Designations
 2012 QZ21 = 2005 ES173 = 2010 HT91 = 2011 KW34 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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