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2889 Brno (1981 WT1)
Classification: Main-belt Asteroid          SPK-ID: 2002889
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1170553087887028 3.3769e-08  
a 3.022152933535989 1.4582e-08 au
q 2.66839388869425 1.0252e-07 au
i 9.496098220225525 3.7413e-06 deg
node 220.1850280487808 2.2214e-05 deg
peri 124.4593371099295 2.6908e-05 deg
M 169.4561318279819 1.6026e-05 deg
tp 2458097.208608920225
(2017-Dec-09.70860892)
8.4044e-05 TDB
period 1918.991642738665
5.25
1.3889e-05
3.803e-08
d
yr
n .1875985241323044 1.3578e-09 deg/d
Q 3.375911978377728 1.6289e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2600  
   data-arc span      24378 days (66.74 yr)  
   first obs. used      1953-05-07  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41629  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:33:46  

Additional Information
 Earth MOID = 1.67624 au 
 Jupiter MOID = 2.11463 au 
 T_jup = 3.215 
[ 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 11.5   n/a MPO365280  
diameter diameter 17.184 km 0.297 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.51 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.150   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2889 Brno (1981 WT1)          Discovered 1981-Nov-17 by Mrkos, A. at Klet
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 WT1 = 1953 JE = 1958 GE = 1970 SF1 = 1976 UO4 = 1983 AB1 = 1984 HN2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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