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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1429263465330987 1.9862e-08  
a 2.327942984161845 6.8342e-09 au
q 1.995218598498233 4.6559e-08 au
i 3.670166618651714 2.4461e-07 deg
node 101.1848101966393 8.8842e-06 deg
peri 296.6221927225207 1.0628e-05 deg
M 243.8938231933432 7.7404e-06 deg
tp 2459618.917422514568
(2022-Feb-08.41742251)
2.8875e-05 TDB
period 1297.349342198032
3.55
5.713e-06
1.564e-08
d
yr
n .2774888677170566 1.2219e-09 deg/d
Q 2.660667369825457 7.811e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2659  
   data-arc span      33161 days (90.79 yr)  
   first obs. used      1929-10-29  
   last obs. used      2020-08-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4756  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:14:26  

Additional Information
 Earth MOID = 1.00491 au 
 Jupiter MOID = 2.73986 au 
 T_jup = 3.556 
[ 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 13.18   n/a E2021B10  
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. 2020-October); 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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