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81915 Hartwick (2000 NS11)
Classification: Outer Main-belt Asteroid          SPK-ID: 2081915
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03894775830696977 5.2015e-08  
a 3.216889219187894 2.9097e-08 au
q 3.091598595378668 1.7167e-07 au
i 9.658189064820219 4.9302e-06 deg
node 230.5345234744772 3.1945e-05 deg
peri 294.591078414513 6.5066e-05 deg
M 353.3114322202667 5.699e-05 deg
tp 2459239.654638298127
(2021-Jan-25.15463830)
0.00033372 TDB
period 2107.427217832256
5.77
2.8593e-05
7.828e-08
d
yr
n .1708244047309513 2.3177e-09 deg/d
Q 3.342179842997121 3.023e-08 au
  Orbit Determination Parameters
   # obs. used (total)      727  
   data-arc span      8325 days (22.79 yr)  
   first obs. used      1998-03-31  
   last obs. used      2021-01-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54053  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 07:28:27  

Additional Information
 Earth MOID = 2.11071 au 
 Jupiter MOID = 1.69153 au 
 T_jup = 3.167 
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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 14.3   n/a MPO381804  
diameter diameter 8.682 km 0.164 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.045   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

81915 Hartwick           Discovered 2000 July 15 by D. D. Balam at the Dominion Astrophysical Observatory, Victoria.
F. David A. Hartwick (b. 1941) is a professor of physics and astronomy at the University of Victoria and a leading authority in the field of galaxy formation and evolution. He is legendary for his encyclopedic knowledge of astronomy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040928/MPCPages.arcLast Updated: 2004-09-28

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Alternate Designations
 2000 NS11 = 1998 FQ98 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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