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212693 (2007 HD18)
Classification: Main-belt Asteroid          SPK-ID: 2212693
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07460868196564001 4.2428e-08  
a 2.721854649876648 2.4302e-08 au
q 2.518780661947303 1.2138e-07 au
i 5.711927648939187 5.2448e-06 deg
node 60.49962826336487 5.6652e-05 deg
peri 213.1338559426231 7.1894e-05 deg
M 6.466964318850966 4.497e-05 deg
tp 2459367.035858918360
(2021-Jun-01.53585892)
0.00020489 TDB
period 1640.196275472116
4.49
2.1966e-05
6.014e-08
d
yr
n .2194859270097886 2.9395e-09 deg/d
Q 2.924928637805993 2.6115e-08 au
  Orbit Determination Parameters
   # obs. used (total)      448  
   data-arc span      9360 days (25.63 yr)  
   first obs. used      1995-10-21  
   last obs. used      2021-06-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55355  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 15:34:06  

Additional Information
 Earth MOID = 1.50482 au 
 Jupiter MOID = 2.13678 au 
 T_jup = 3.347 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457373.5 (2015-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07397385429511588 4.2549e-08  
q 2.521344108945634 1.2161e-07 au
tp 2457721.863411654981
(2016-Nov-29.36341166)
0.00020699 TDB
node 60.5254468435089 5.6649e-05 deg
peri 211.9973603308524 7.2027e-05 deg
i 5.711680807824895 5.244e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      448  
   data-arc span      9360 days (25.63 yr)  
   first obs. used      1995-10-21  
   last obs. used      2021-06-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55355  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 15:34:06  

Additional Information
 Jupiter MOID = 2.13678 au 
 T_jup = 3.347 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.810379979451202E-15 -5.085661871790481E-15 -1.208208824777384E-12 -9.558256134621293E-15 -2.031514198909158E-13 1.272294502377227E-15
q -5.085661871790481E-15 1.478910200414119E-14 2.869570158552531E-12 2.889579753222071E-14 4.30854525240964E-13 -3.146437270240804E-15
tp -1.208208824777384E-12 2.869570158552531E-12 4.284459546072474E-8 -1.07631487414222E-11 9.242869218025573E-9 2.531738048369557E-12
node -9.558256134621293E-15 2.889579753222071E-14 -1.07631487414222E-11 3.209159569283944E-9 -3.19548551683128E-9 -8.425290076192021E-11
peri -2.031514198909158E-13 4.30854525240964E-13 9.242869218025573E-9 -3.19548551683128E-9 5.187825952984597E-9 8.443541180740106E-11
i 1.272294502377227E-15 -3.146437270240804E-15 2.531738048369557E-12 -8.425290076192021E-11 8.443541180740106E-11 2.749989555415358E-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 16.04   n/a E2021B55  
diameter diameter 5.066 km 0.244 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.033   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

212693 (2007 HD18)          Discovered 2007-Apr-16 by CSS at Catalina
Reference: 20090409/Numbers.arcLast Updated: 2009-04-10

Alternate Designations
 2007 HD18 = 2005 YZ286 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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