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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0923081665102712 2.4127e-08  
a 5.229203486997497 7.4662e-08 au
q 4.746505300803642 1.4811e-07 au
i 21.88241971996688 7.44e-07 deg
node 197.919348821665 3.0873e-06 deg
peri 357.8772673492223 1.1842e-05 deg
M 25.77122849787344 1.2708e-05 deg
tp 2458687.831333912702
(2019-Jul-23.33133391)
0.00015678 TDB
period 4367.689332338798
11.96
9.3543e-05
2.561e-07
d
yr
n .08242344466547218 1.7653e-09 deg/d
Q 5.711901673191353 8.1554e-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 = 3.74527 au 
 Jupiter MOID = .711034 au 
 T_jup = 2.848 
[ hide covariance matrix ]
Orbital Elements at Epoch 2459258.5 (2021-Feb-13.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09203313434165086 2.4194e-08  
q 4.747486706142498 1.4795e-07 au
tp 2458689.114368741988
(2019-Jul-24.61436874)
0.00015714 TDB
node 197.9198819391355 3.0865e-06 deg
peri 358.0152930637131 1.1882e-05 deg
i 21.88278085103415 7.4374e-07 deg
  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
 Jupiter MOID = .711034 au 
 T_jup = 2.848 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.853560448197328E-16 -3.188755403479033E-15 4.819499076144051E-13 4.306851969678148E-14 5.916327319904361E-14 9.727716276267676E-15
q -3.188755403479033E-15 2.189008105580177E-14 -6.869773913684586E-12 -2.239824086510251E-13 -8.014910984378371E-13 -5.045418664260421E-14
tp 4.819499076144051E-13 -6.869773913684586E-12 2.469182982252737E-8 2.956930796179575E-10 1.789854277545805E-9 6.834017445917618E-11
node 4.306851969678148E-14 -2.239824086510251E-13 2.956930796179575E-10 9.526400371164157E-12 1.790804958122272E-11 2.254525165827347E-12
peri 5.916327319904361E-14 -8.014910984378371E-13 1.789854277545805E-9 1.790804958122272E-11 1.411752549847152E-10 4.050496549933952E-12
i 9.727716276267676E-15 -5.045418664260421E-14 6.834017445917618E-11 2.254525165827347E-12 4.050496549933952E-12 5.531557178266131E-13

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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