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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1166854016386149 3.4181e-08  
a 3.022970207370615 1.5085e-08 au
q 2.670233714582008 1.0438e-07 au
i 9.496247234399556 4.1408e-06 deg
node 220.1992181984068 2.2216e-05 deg
peri 124.4752257538523 2.7752e-05 deg
M 94.427122142453 1.6773e-05 deg
tp 2458096.948979374821
(2017-Dec-09.44897937)
8.9085e-05 TDB
period 1919.770118076749
5.26
1.437e-05
3.934e-08
d
yr
n .1875224520947606 1.4037e-09 deg/d
Q 3.375706700159223 1.6846e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2498  
   data-arc span      24316 days (66.57 yr)  
   first obs. used      1953-05-07  
   last obs. used      2019-12-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42161  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:22:04  

Additional Information
 Earth MOID = 1.67718 au 
 Jupiter MOID = 2.11269 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-January); 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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