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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09604717605805906 6.1785e-08  
a 3.219024944017038 3.4903e-08 AU
q 2.90984668848375 1.9916e-07 AU
i 15.00813373227506 6.9786e-06 deg
node 264.3639714702456 2.6607e-05 deg
peri 278.6159350488424 4.486e-05 deg
M 143.8306199584553 3.7224e-05 deg
tp 2456157.682020738396
(2012-Aug-18.18202074)
0.00021639 JED
period 2109.52627904835
5.78
3.4309e-05
9.393e-08
d
yr
n .1706544277620487 2.7755e-09 deg/d
Q 3.528203199550326 3.8255e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1050  
   data-arc span      13912 days (38.09 yr)  
   first obs. used      1976-10-24  
   last obs. used      2014-11-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46573  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-07 23:55:33  

Additional Information
 Earth MOID = 1.96067 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 LCDB (Rev. 2015-Feb); 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:
[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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