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2145 Blaauw (1976 UF)
Classification: Outer Main-belt Asteroid          SPK-ID: 2002145
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09591483088176742 6.6224e-08  
a 3.219239779122442 3.6975e-08 AU
q 2.910466940140055 2.176e-07 AU
i 15.00905484909403 7.3573e-06 deg
node 264.3691946502282 2.7109e-05 deg
peri 278.6032667772058 4.6227e-05 deg
M 109.7221138106737 3.7539e-05 deg
tp 2456157.486516084797
(2012-Aug-17.98651608)
0.00021927 JED
period 2109.737464672815
5.78
3.6348e-05
9.952e-08
d
yr
n .1706373451806858 2.9398e-09 deg/d
Q 3.528012618104829 4.0522e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      972  
   data-arc span      13764 days (37.68 yr)  
   first obs. used      1976-10-24  
   last obs. used      2014-07-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47584  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:01:53  

Additional Information
 Earth MOID = 1.9605 AU 
 T_jup = 3.129 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.8 mag n/a MPO265968  
diameter diameter 34.20 km 1.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 10
rotation period rot_per 12.141 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Moravec, P.; Cochren, J.; Gerhardt, M.; Harris, A.; et al. (2012) Minor Planet Bul. 39, 213-216.]
geometric albedo albedo 0.0869   0.010 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 10

2145 Blaauw (1976 UF)          Discovered 1976-Oct-24 by West, R. M. at La Silla (809)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1976 UF = 1929 XS = 1963 RK = 1980 TW 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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