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1873 Agenor (1971 FH)
Classification: Jupiter Trojan          SPK-ID: 2001873
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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09249208128596596 6.6072e-08  
a 5.229766741112274 9.392e-08 au
q 4.746054730586676 3.8887e-07 au
i 21.88146212516403 5.5192e-06 deg
node 197.9192898866805 1.2567e-05 deg
peri 357.5881705881648 3.0153e-05 deg
M 353.0403525092021 2.598e-05 deg
tp 2458684.951359900448
(2019-Jul-20.45135990)
0.00031483 TDB
period 4368.395037875092
11.96
0.00011768
3.222e-07
d
yr
n .08241012932180096 2.22e-09 deg/d
Q 5.713478751637872 1.0261e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1700  
   data-arc span      17579 days (48.13 yr)  
   first obs. used      1971-03-25  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47103  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:28:12  

Additional Information
 Earth MOID = 3.74525 au 
 Jupiter MOID = .708221 au 
 T_jup = 2.848 
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Orbital Elements at Epoch 2456631.5 (2013-Dec-05.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09110459813388046 6.5721e-08  
q 4.764491395003162 3.8851e-07 au
tp 2458676.199288843568
(2019-Jul-11.69928884)
0.00032234 TDB
node 197.903651112269 1.2565e-05 deg
peri 356.3837137271899 3.0784e-05 deg
i 21.86853974281999 5.5158e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1700  
   data-arc span      17579 days (48.13 yr)  
   first obs. used      1971-03-25  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47103  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:28:12  

Additional Information
 Jupiter MOID = .708221 au 
 T_jup = 2.848 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.319218267285498E-15 -2.499893855669418E-14 4.164204080846129E-12 -1.064800301011879E-14 6.726311729096716E-13 1.072475992353487E-15
q -2.499893855669418E-14 1.50941054543405E-13 -2.721266025848774E-11 6.749759390747257E-14 -4.454412239897721E-12 -3.729231424762879E-15
tp 4.164204080846129E-12 -2.721266025848774E-11 1.039053236172858E-7 -2.132197128004453E-11 8.889503225916238E-9 1.85964919526902E-11
node -1.064800301011879E-14 6.749759390747257E-14 -2.132197128004453E-11 1.578722451097196E-10 -1.491502399774299E-10 1.655276978583759E-11
peri 6.726311729096716E-13 -4.454412239897721E-12 8.889503225916238E-9 -1.491502399774299E-10 9.47672250816718E-10 -1.389448453637529E-11
i 1.072475992353487E-15 -3.729231424762879E-15 1.85964919526902E-11 1.655276978583759E-11 -1.389448453637529E-11 3.042376573202179E-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 10.1   n/a MPO435714  
diameter diameter 50.799 km 1.181 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 20.60 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
[Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.]
geometric albedo albedo 0.062   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

1873 Agenor (1971 FH)          Discovered 1971-Mar-25 by Van Houten, C. J. at Palomar
Discovered by C. J. van Houten and I. van Houten-Groeneveld, Leiden, on plates exposed by T. Gehrels in a survey of faint Trojans with the 122 cm Schmidt camera at Palomar.
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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