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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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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04052785875776357 2.733e-08  
a 2.536156295485281 7.442e-09 au
q 2.433371311354241 6.954e-08 au
i 4.783841447977075 4.5268e-06 deg
node 35.502899375 4.1934e-05 deg
peri 64.67714510937108 8.7047e-05 deg
M 169.2820490738549 7.3931e-05 deg
tp 2458306.801341253885
(2018-Jul-07.30134125)
0.00030303 TDB
period 1475.23921475955
4.04
6.4933e-06
1.778e-08
d
yr
n .2440282202359138 1.0741e-09 deg/d
Q 2.638941279616322 7.7436e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2748  
   data-arc span      37391 days (102.37 yr)  
   first obs. used      1918-03-16  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42093  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:34:18  

Additional Information
 Earth MOID = 1.45478 au 
 Jupiter MOID = 2.40786 au 
 T_jup = 3.442 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456212.5 (2012-Oct-12.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .041059217807668 2.7375e-08  
q 2.430616444756373 6.9715e-08 au
tp 2456837.986681767503
(2014-Jun-29.48668177)
0.00029798 TDB
node 35.60590969042 4.1902e-05 deg
peri 65.7799834555734 8.5894e-05 deg
i 4.7866286726871 4.5274e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2748  
   data-arc span      37391 days (102.37 yr)  
   first obs. used      1918-03-16  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42093  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:34:18  

Additional Information
 Jupiter MOID = 2.40786 au 
 T_jup = 3.442 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.493817541983916E-16 -1.897900516970353E-15 -3.510190298139447E-13 -4.28445894580271E-15 -9.828059025240087E-14 1.724869493889645E-16
q -1.897900516970353E-15 4.860242695668247E-15 6.306392667453242E-13 1.096973339782502E-14 1.770256053626483E-13 -2.698977014180715E-16
tp -3.510190298139447E-13 6.306392667453242E-13 8.879117060717803E-8 -8.344530539923896E-11 2.23522576423526E-8 -1.562643448383229E-11
node -4.28445894580271E-15 1.096973339782502E-14 -8.344530539923896E-11 1.755757706851045E-9 -1.770058533564683E-9 -6.72509039465961E-11
peri -9.828059025240087E-14 1.770256053626483E-13 2.23522576423526E-8 -1.770058533564683E-9 7.377723261211382E-9 6.310633118799397E-11
i 1.724869493889645E-16 -2.698977014180715E-16 -1.562643448383229E-11 -6.72509039465961E-11 6.310633118799397E-11 2.049754764101027E-11

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

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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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