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172805 (2004 FQ156)
Classification: Main-belt Asteroid          SPK-ID: 2172805
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1183939884448271 4.7041e-08  
a 3.011833568712662 2.6314e-08 au
q 2.655250579980752 1.4298e-07 au
i 2.908269600524703 6.0325e-06 deg
node 142.173351412403 0.00011221 deg
peri 308.7563398627123 0.0001164 deg
M 113.1930620151966 2.7967e-05 deg
tp 2458400.208507322711
(2018-Oct-08.70850732)
0.00014824 TDB
period 1909.17122937103
5.23
2.502e-05
6.85e-08
d
yr
n .1885634952285556 2.4712e-09 deg/d
Q 3.368416557444571 2.9429e-08 au
  Orbit Determination Parameters
   # obs. used (total)      363  
   data-arc span      6352 days (17.39 yr)  
   first obs. used      2001-09-18  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58227  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 19:15:05  

Additional Information
 Earth MOID = 1.67308 au 
 Jupiter MOID = 1.80979 au 
 T_jup = 3.237 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456610.5 (2013-Nov-14.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1201732581794969 4.7096e-08  
q 2.652096006866747 1.4414e-07 au
tp 2456494.058259642223
(2013-Jul-20.55825964)
0.00014817 TDB
node 142.1848349398024 0.00011228 deg
peri 309.5096980847706 0.00011632 deg
i 2.906848841436615 6.0301e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      363  
   data-arc span      6352 days (17.39 yr)  
   first obs. used      2001-09-18  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58227  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 19:15:05  

Additional Information
 Jupiter MOID = 1.80979 au 
 T_jup = 3.237 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.21807897329712E-15 -6.699284109999775E-15 6.899713394397728E-13 -8.958745959503091E-15 1.753371558694789E-13 -7.538956651611529E-16
q -6.699284109999775E-15 2.07771476540055E-14 -2.756414641394915E-12 2.51854047151615E-14 -6.558146083137188E-13 2.322374747823304E-15
tp 6.899713394397728E-13 -2.756414641394915E-12 2.195494311193015E-8 -7.479371745458034E-11 4.540967645144037E-9 1.655826398210916E-12
node -8.958745959503091E-15 2.51854047151615E-14 -7.479371745458034E-11 1.260730809854009E-8 -1.260568663225668E-8 7.712517506212238E-11
peri 1.753371558694789E-13 -6.558146083137188E-13 4.540967645144037E-9 -1.260568663225668E-8 1.353057831347989E-8 -7.668922200528917E-11
i -7.538956651611529E-16 2.322374747823304E-15 1.655826398210916E-12 7.712517506212238E-11 -7.668922200528917E-11 3.636260033062624E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.7   n/a MPO436859  

172805 (2004 FQ156)          Discovered 2004-Mar-17 by Spacewatch at Kitt Peak
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

[ show close-approach data ]
Alternate Designations
 2004 FQ156 = 2001 SK7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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