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1447 Utra (1938 BB)
Classification: Main-belt Asteroid          SPK-ID: 2001447
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04052785869988774 2.7339e-08  
a 2.536156295537084 7.478e-09 au
q 2.433371311550726 6.9548e-08 au
i 4.783841836516417 4.5652e-06 deg
node 35.50289711184863 4.2071e-05 deg
peri 64.67714810055234 8.8801e-05 deg
M 169.2820483526077 7.5682e-05 deg
tp 2458306.801344188221
(2018-Jul-07.30134419)
0.00031027 TDB
period 1475.239214804749
4.04
6.5247e-06
1.786e-08
d
yr
n .2440282202284371 1.0793e-09 deg/d
Q 2.638941279523442 7.7811e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2732  
   data-arc span      37333 days (102.21 yr)  
   first obs. used      1918-03-16  
   last obs. used      2020-06-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42185  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:31:22  

Additional Information
 Earth MOID = 1.45478 au 
 Jupiter MOID = 2.40786 au 
 T_jup = 3.442 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.7   n/a MPO267712  
diameter diameter 11.834 km 0.122 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 257. 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:
[Martinez, L. (2011) http://lenomiyaobs.org/Blank.html]
geometric albedo albedo 0.303   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

1447 Utra (1938 BB)          Discovered 1938-Jan-26 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1938 BB = 1936 SB = 1951 KO = A918 FA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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