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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09209886152629386 2.4181e-08  
a 5.228752505135476 7.4368e-08 au
q 4.747190352209741 1.4801e-07 au
i 21.88274318536662 7.4381e-07 deg
node 197.9197570762827 3.0867e-06 deg
peri 357.982261927803 1.1871e-05 deg
M 42.18013848390104 1.2603e-05 deg
tp 2458688.816920455782
(2019-Jul-24.31692046)		 0.00015704 TDB
period 4367.124320993507
11.96		 9.317e-05
2.551e-07		 d
yr
n .08243410847486501 1.7587e-09 deg/d
Q 5.71031465806121 8.1218e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2401  
   data-arc span      8115 days (22.22 yr)  
   first obs. used      1998-06-19  
   last obs. used      2020-09-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42222  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2021-Feb-08 14:23:54  

Additional Information
 Earth MOID = 3.74523 au 
 Jupiter MOID = .711592 au 
 T_jup = 2.848 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.25   n/a E2021B10  
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. 2020-October); 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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