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3696 Herald (1980 OF)
Classification: Main-belt Asteroid          SPK-ID: 2003696
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1461622624244434 2.1583e-08  
a 3.12264991155156 1.669e-08 au
q 2.666236335719696 6.9502e-08 au
i 10.11328069910712 1.2244e-06 deg
node 312.2426369890442 2.1435e-06 deg
peri 18.51938274533236 7.8191e-06 deg
M 124.7553837253291 1.0973e-05 deg
tp 2458502.042205822492
(2019-Jan-18.54220582)
5.9585e-05 TDB
period 2015.502645220528
5.52
1.6159e-05
4.424e-08
d
yr
n .178615493685254 1.432e-09 deg/d
Q 3.579063487383424 1.9129e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2382  
   data-arc span      16138 days (44.18 yr)  
   first obs. used      1977-01-12  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44278  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:09:31  

Additional Information
 Earth MOID = 1.65524 au 
 Jupiter MOID = 1.77239 au 
 T_jup = 3.175 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457436.5 (2016-Feb-18.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1487624261278754 2.1808e-08  
q 2.657190021142128 7.0451e-08 au
tp 2456478.926791129404
(2013-Jul-05.42679113)
5.6579e-05 TDB
node 312.6170042176877 2.1196e-06 deg
peri 16.94047592890394 7.7008e-06 deg
i 10.15061686640541 1.2294e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2382  
   data-arc span      16138 days (44.18 yr)  
   first obs. used      1977-01-12  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44278  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:09:31  

Additional Information
 Jupiter MOID = 1.77239 au 
 T_jup = 3.175 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.755702155957822E-16 -1.505039609351036E-15 8.596834102911761E-13 -2.506909783377394E-15 1.056577599317857E-13 5.524379916697288E-15
q -1.505039609351036E-15 4.96328572258154E-15 -2.682812123414823E-12 7.629786876547068E-15 -3.152923361435085E-13 -1.654861571438795E-14
tp 8.596834102911761E-13 -2.682812123414823E-12 3.201168397542943E-9 7.064371854645974E-12 4.183400295706525E-10 6.132751906155832E-12
node -2.506909783377394E-15 7.629786876547068E-15 7.064371854645974E-12 4.492671888212037E-12 -2.700925712959073E-12 2.014294094015025E-12
peri 1.056577599317857E-13 -3.152923361435085E-13 4.183400295706525E-10 -2.700925712959073E-12 5.930285790269585E-11 -1.212807300764844E-12
i 5.524379916697288E-15 -1.654861571438795E-14 6.132751906155832E-12 2.014294094015025E-12 -1.212807300764844E-12 1.51134018858028E-12

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 12.49   n/a E2021B10  
diameter diameter 16.300 km 0.332 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.088   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3696 Herald (1980 OF)          Discovered 1980-Jul-17 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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