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3492 Petra-Pepi (1985 DQ)
Classification: Main-belt Asteroid          SPK-ID: 2003492
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1442719536772994 2.8958e-08  
a 2.617086267112675 8.4086e-09 au
q 2.239514118414299 7.3983e-08 au
i 13.62757808906852 3.8445e-06 deg
node 138.7750198655645 1.3908e-05 deg
peri 97.36993211077684 1.9748e-05 deg
M 58.07254569248337 1.3767e-05 deg
tp 2458751.044060838848
(2019-Sep-24.54406084)
5.9052e-05 TDB
period 1546.412974102471
4.23
7.4529e-06
2.04e-08
d
yr
n .2327968052705596 1.122e-09 deg/d
Q 2.994658415811051 9.6218e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2950  
   data-arc span      25482 days (69.77 yr)  
   first obs. used      1951-02-10  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41731  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:12:29  

Additional Information
 Earth MOID = 1.27657 au 
 Jupiter MOID = 2.16404 au 
 T_jup = 3.352 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457157.5 (2015-May-15.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1430774479354125 2.9057e-08  
q 2.241973755667286 7.4038e-08 au
tp 2457204.235685054353
(2015-Jun-30.73568505)
5.9505e-05 TDB
node 138.8202478303572 1.3918e-05 deg
peri 97.19509296885262 1.9822e-05 deg
i 13.62193900555935 3.8432e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2950  
   data-arc span      25482 days (69.77 yr)  
   first obs. used      1951-02-10  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41731  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:12:29  

Additional Information
 Jupiter MOID = 2.16404 au 
 T_jup = 3.352 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.443017858245561E-16 -2.142239061043379E-15 -3.821477828682592E-13 3.174506535730216E-15 -1.002316747937542E-13 -1.337585984182395E-15
q -2.142239061043379E-15 5.481683552066875E-15 9.709244573357329E-13 -8.479547710170332E-15 2.543453969870278E-13 3.379154951283651E-15
tp -3.821477828682592E-13 9.709244573357329E-13 3.540813600329353E-9 1.429069267424967E-14 8.504001705627893E-10 5.133108916055641E-12
node 3.174506535730216E-15 -8.479547710170332E-15 1.429069267424967E-14 1.937075930787388E-10 -1.879749259396265E-10 1.153633599615313E-11
peri -1.002316747937542E-13 2.543453969870278E-13 8.504001705627893E-10 -1.879749259396265E-10 3.92909094239655E-10 -1.00809365660555E-11
i -1.337585984182395E-15 3.379154951283651E-15 5.133108916055641E-12 1.153633599615313E-11 -1.00809365660555E-11 1.477015922160361E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.8   n/a MPO473813  
diameter diameter 11.658 km 0.127 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 47.05 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Stephens, R.D. (2011) Minor Planet Bull. 38, 211-212.]
[Hanus, J.; Broz, M.; Durech, J.; Warner, B.D.; et al. (2013) Astron. Astrophys. 559, A134.]
geometric albedo albedo 0.248   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

3492 Petra-Pepi (1985 DQ)          Discovered 1985-Feb-16 by Mahrova, M. at Klet
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1985 DQ = 1951 CG = 1977 JD1 = 1978 SA1 = 1978 TK9 = 1980 CB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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