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379961 (2012 QA9)
Classification: Main-belt Asteroid          SPK-ID: 2379961
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09700504573688022 1.0481e-07  
a 3.082431116807456 7.0871e-08 au
q 2.783419745340766 3.0534e-07 au
i 8.090664310571986 8.4531e-06 deg
node 265.4348778023246 5.735e-05 deg
peri 75.53773119795015 7.2637e-05 deg
M 145.9338971782136 4.874e-05 deg
tp 2458199.205472184489
(2018-Mar-21.70547218)
0.00026316 TDB
period 1976.689690273335
5.41
6.8172e-05
1.866e-07
d
yr
n .1821226678984801 6.281e-09 deg/d
Q 3.381442488274146 7.7746e-08 au
  Orbit Determination Parameters
   # obs. used (total)      141  
   data-arc span      4500 days (12.32 yr)  
   first obs. used      2007-10-08  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50202  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 03:15:21  

Additional Information
 Earth MOID = 1.78891 au 
 Jupiter MOID = 1.98032 au 
 T_jup = 3.205 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457859.5 (2017-Apr-16.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09616821767004897 1.0487e-07  
q 2.78466077321074 3.0503e-07 au
tp 2458198.468948832797
(2018-Mar-20.96894883)
0.00026522 TDB
node 265.4455846039567 5.7357e-05 deg
peri 75.42324340140921 7.2887e-05 deg
i 8.090772038108781 8.4534e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      141  
   data-arc span      4500 days (12.32 yr)  
   first obs. used      2007-10-08  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50202  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 03:15:21  

Additional Information
 Jupiter MOID = 1.98032 au 
 T_jup = 3.205 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.099717058067465E-14 -3.137795593718835E-14 9.696821049564067E-12 -5.84387389356605E-14 1.138083011635005E-12 2.29835907151257E-15
q -3.137795593718835E-14 9.304456367026306E-14 -2.795389630124411E-11 1.583476001484914E-13 -3.408929254600695E-12 2.040186027509396E-15
tp 9.696821049564067E-12 -2.795389630124411E-11 7.034221364010527E-8 -1.012467303192272E-11 1.193067504852437E-8 -2.485137384708716E-11
node -5.84387389356605E-14 1.583476001484914E-13 -1.012467303192272E-11 3.289799619767863E-9 -3.255023533665703E-9 -1.72609757118129E-11
peri 1.138083011635005E-12 -3.408929254600695E-12 1.193067504852437E-8 -3.255023533665703E-9 5.312446852640222E-9 1.242840570191586E-11
i 2.29835907151257E-15 2.040186027509396E-15 -2.485137384708716E-11 -1.72609757118129E-11 1.242840570191586E-11 7.146041629649622E-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 15.8   n/a MPO460490  

379961 (2012 QA9)          Discovered 2007-Oct-08 by CSS at Catalina
Reference: Last Updated: 2013-11-20

[ show close-approach data ]
Alternate Designations
 2012 QA9 = 2007 TG242 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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