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2773 Brooks (1981 JZ2)
Classification: Main-belt Asteroid          SPK-ID: 2002773
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1431410552320154 3.9819e-08  
a 2.327314620620113 7.9613e-09 au
q 1.994180349967652 9.2733e-08 au
i 3.670288299280864 3.3288e-06 deg
node 101.1837448997573 7.38e-05 deg
peri 296.7147828135709 7.5121e-05 deg
M 188.2834977839898 1.3914e-05 deg
tp 2459619.072496873017
(2022-Feb-08.57249687)
5.0854e-05 TDB
period 1296.824102520788
3.55
6.6543e-06
1.822e-08
d
yr
n .2776012562538174 1.4244e-09 deg/d
Q 2.660448891272573 9.1009e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2213  
   data-arc span      32969 days (90.26 yr)  
   first obs. used      1929-10-29  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50428  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:30:35  

Additional Information
 Earth MOID = 1.00494 au 
 Jupiter MOID = 2.73907 au 
 T_jup = 3.557 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.1   n/a MPO332843  
diameter diameter 13.434 km 0.103 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.838 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.040   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2773 Brooks (1981 JZ2)          Discovered 1981-May-06 by Shoemaker, C. at Palomar
on plates by E. F. Helin and S. J. Bus.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 JZ2 = 1929 VO = 1975 VS2 = 1982 SH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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