Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
2889 Brno (1981 WT1)
Classification: Main-belt Asteroid          SPK-ID: 2002889
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1170553094928826 3.3567e-08  
a 3.022152932808118 1.4268e-08 au
q 2.668393885923441 1.0159e-07 au
i 9.496097813619452 3.4662e-06 deg
node 220.1850273070684 2.2114e-05 deg
peri 124.4593389441243 2.6351e-05 deg
M 169.4561310249963 1.5567e-05 deg
tp 2458097.208613526897
(2017-Dec-09.70861353)
8.1207e-05 TDB
period 1918.991642045395
5.25
1.3589e-05
3.72e-08
d
yr
n .1875985242000778 1.3285e-09 deg/d
Q 3.375911979692794 1.5938e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2857  
   data-arc span      24511 days (67.11 yr)  
   first obs. used      1953-05-07  
   last obs. used      2020-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40396  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:51:03  

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Aug-11 11:13 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin