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780 Armenia (A914 BJ)
Classification: Main-belt Asteroid          SPK-ID: 2000780
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09759636990855121 3.7366e-08  
a 3.112255984083843 1.4047e-08 au
q 2.808511097811094 1.1798e-07 au
i 19.09007599156106 4.0618e-06 deg
node 144.8418053048213 1.2553e-05 deg
peri 213.8248636038368 2.5099e-05 deg
M 238.2372117572323 2.3921e-05 deg
tp 2459678.802591810333
(2022-Apr-09.30259181)
0.00013543 TDB
period 2005.447941655721
5.49
1.3577e-05
3.717e-08
d
yr
n .1795110172257974 1.2153e-09 deg/d
Q 3.416000870356592 1.5418e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2826  
   data-arc span      40659 days (111.32 yr)  
   first obs. used      1909-02-20  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40556  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:20:37  

Additional Information
 Earth MOID = 1.81812 au 
 Jupiter MOID = 2.01508 au 
 T_jup = 3.127 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456338.5 (2013-Feb-15.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09719986290196575 3.7405e-08  
q 2.810346087225081 1.1814e-07 au
tp 2455673.899300937095
(2011-Apr-22.39930094)
0.00012532 TDB
node 144.8640194867765 1.2559e-05 deg
peri 215.0720190176216 2.5169e-05 deg
i 19.08454017894903 4.0607e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2826  
   data-arc span      40659 days (111.32 yr)  
   first obs. used      1909-02-20  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40556  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:20:37  

Additional Information
 Jupiter MOID = 2.01508 au 
 T_jup = 3.127 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.399133686375694E-15 -4.393723875176791E-15 -7.653259906119888E-14 -2.672763012260854E-15 4.254855073442035E-15 1.782438563284041E-15
q -4.393723875176791E-15 1.395804490679922E-14 6.887163111040738E-13 9.840159104952868E-15 6.989205647790042E-14 -3.858939306103018E-15
tp -7.653259906119888E-14 6.887163111040738E-13 1.570479863725594E-8 -2.260199969151547E-12 2.759535552406772E-9 9.194218891940059E-12
node -2.672763012260854E-15 9.840159104952868E-15 -2.260199969151547E-12 1.577191197099368E-10 -1.487192467230133E-10 4.016980036540193E-12
peri 4.254855073442035E-15 6.989205647790042E-14 2.759535552406772E-9 -1.487192467230133E-10 6.334627639095467E-10 -1.946426291028332E-12
i 1.782438563284041E-15 -3.858939306103018E-15 9.194218891940059E-12 4.016980036540193E-12 -1.946426291028332E-12 1.648888534890176E-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 9.0   n/a MPO435702  
diameter diameter 126.263 km 0.759 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 19.891 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Benishek, V.; Pilcher, F. (2009) Minor Planet Bull. 36, 167-168.]
[Marciniak, A.; Pilcher, F.; Oszkiewicz, D.; Santana-Ros, T.; et al. (2015) Planet. Space Sci. 118, 256-266.]
geometric albedo albedo 0.028   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

780 Armenia (A914 BJ)          Discovered 1914-Jan-25 by Neujmin, G. at Simeis
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A914 BJ = A909 DE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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