Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
1873 Agenor (1971 FH)
Classification: Jupiter Trojan          SPK-ID: 2001873
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09230812761765864 4.9943e-08  
a 5.229203579397266 7.7338e-08 au
q 4.746505588051546 2.7663e-07 au
i 21.88241643603191 5.3796e-06 deg
node 197.9193267170143 1.054e-05 deg
peri 357.8772221684335 2.9013e-05 deg
M 25.77128447034408 2.4403e-05 deg
tp 2458687.830646541082
(2019-Jul-23.33064654)
0.0002989 TDB
period 4367.689448104082
11.96
9.6895e-05
2.653e-07
d
yr
n .08242344248084491 1.8285e-09 deg/d
Q 5.711901570742987 8.4477e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2110  
   data-arc span      17982 days (49.23 yr)  
   first obs. used      1971-03-25  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44187  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:38:15  

Additional Information
 Earth MOID = 3.74527 au 
 Jupiter MOID = .711034 au 
 T_jup = 2.848 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457239.5 (2015-Aug-05.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09204331534209281 4.9456e-08  
q 4.755505096451966 2.7405e-07 au
tp 2458675.086007483478
(2019-Jul-10.58600748)
0.00030437 TDB
node 197.9155715154353 1.0536e-05 deg
peri 356.5066047038695 2.9392e-05 deg
i 21.87771119126186 5.3787e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2110  
   data-arc span      17982 days (49.23 yr)  
   first obs. used      1971-03-25  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44187  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:38:15  

Additional Information
 Jupiter MOID = .711034 au 
 T_jup = 2.848 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.445931277863706E-15 -1.309158779686364E-14 6.91203893221704E-12 3.520979243265073E-16 6.512937998233975E-13 9.497953613881238E-16
q -1.309158779686364E-14 7.510069615572828E-14 -4.504870894582952E-11 1.498822289624681E-15 -4.344922080989667E-12 -3.09295671704587E-15
tp 6.91203893221704E-12 -4.504870894582952E-11 9.264141560469779E-8 -1.356556084802497E-12 8.360571412244283E-9 8.869212671087474E-12
node 3.520979243265073E-16 1.498822289624681E-15 -1.356556084802497E-12 1.110052573792879E-10 -1.030679082251664E-10 2.093258400253707E-11
peri 6.512937998233975E-13 -4.344922080989667E-12 8.360571412244283E-9 -1.030679082251664E-10 8.638875848477176E-10 -1.870310990031992E-11
i 9.497953613881238E-16 -3.09295671704587E-15 8.869212671087474E-12 2.093258400253707E-11 -1.870310990031992E-11 2.893030608006216E-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-August); 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Aug-13 03:49 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin