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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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .092098839060742 2.5289e-08  
a 5.228752551171271 7.3776e-08 au
q 4.747190511472504 1.565e-07 au
i 21.88274143277434 1.111e-06 deg
node 197.9197487806017 4.2164e-06 deg
peri 357.982250171968 1.4408e-05 deg
M 42.18015514246361 1.4146e-05 deg
tp 2458688.816711614848
(2019-Jul-24.31671161)
0.00017616 TDB
period 4367.124378668079
11.96
9.2429e-05
2.531e-07
d
yr
n .08243410738619625 1.7447e-09 deg/d
Q 5.710314590870039 8.0571e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2332  
   data-arc span      18257 days (49.98 yr)  
   first obs. used      1971-03-25  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42857  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 19:49:17  

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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