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243078 (2007 HC87)
Classification: Main-belt Asteroid          SPK-ID: 2243078
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2501235309799544 4.443e-08  
a 2.374685612885319 2.2513e-08 au
q 1.780720862423146 1.0297e-07 au
i 9.088519292490908 6.0158e-06 deg
node 78.20538147150614 3.2177e-05 deg
peri 260.5996879452791 3.5186e-05 deg
M 129.7282158041247 1.6513e-05 deg
tp 2458518.841140674304
(2019-Feb-04.34114067)
5.7338e-05 TDB
period 1336.618932762177
3.66
1.9008e-05
5.204e-08
d
yr
n .2693363016009698 3.8301e-09 deg/d
Q 2.968650363347492 2.8144e-08 au
  Orbit Determination Parameters
   # obs. used (total)      330  
   data-arc span      6098 days (16.70 yr)  
   first obs. used      2003-04-07  
   last obs. used      2019-12-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63088  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 00:58:46  

Additional Information
 Earth MOID = .799143 au 
 Jupiter MOID = 2.48224 au 
 T_jup = 3.483 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457311.5 (2015-Oct-16.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2515513240307367 4.4636e-08  
q 1.776601592731311 1.0352e-07 au
tp 2457182.286184445420
(2015-Jun-08.78618445)
4.917e-05 TDB
node 78.26885391295201 3.2221e-05 deg
peri 260.4794214017793 3.5178e-05 deg
i 9.085072789801515 6.0129e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      330  
   data-arc span      6098 days (16.70 yr)  
   first obs. used      2003-04-07  
   last obs. used      2019-12-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63088  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 00:58:46  

Additional Information
 Jupiter MOID = 2.48224 au 
 T_jup = 3.483 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.992405145074343E-15 -4.56287372371548E-15 1.048019512412672E-12 -3.338160651467598E-14 2.762430281448147E-13 -2.078500965368304E-15
q -4.56287372371548E-15 1.07164801469978E-14 -2.290201562826349E-12 7.31552974797921E-14 -5.932736140465178E-13 4.956580067566838E-15
tp 1.048019512412672E-12 -2.290201562826349E-12 2.417674122010862E-9 -4.469908490238571E-11 7.185934883928371E-10 -7.270190272653064E-12
node -3.338160651467598E-14 7.31552974797921E-14 -4.469908490238571E-11 1.038178758594714E-9 -1.036168768037E-9 -7.492630223755636E-11
peri 2.762430281448147E-13 -5.932736140465178E-13 7.185934883928371E-10 -1.036168768037E-9 1.237461062113239E-9 7.198895385056975E-11
i -2.078500965368304E-15 4.956580067566838E-15 -7.270190272653064E-12 -7.492630223755636E-11 7.198895385056975E-11 3.615528760778466E-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 16.5   n/a MPO440237  
diameter diameter 2.918 km 0.220 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.043   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

243078 (2007 HC87)          Discovered 2007-Apr-24 by Spacewatch at Kitt Peak
Reference: 20100626/Numbers.arcLast Updated: 2010-06-28
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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