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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04025443564796127 2.7195e-08  
a 2.536442821764601 7.7873e-09 au
q 2.434339747421145 6.9157e-08 au
i 4.782605918101149 4.493e-06 deg
node 35.43111592458458 4.1892e-05 deg
peri 65.55674658305723 8.632e-05 deg
M 217.2035865998483 7.3256e-05 deg
tp 2459785.762691841224
(2022-Jul-25.26269184)		 0.00030005 TDB
period 1475.489223055072
4.04		 6.795e-06
1.86e-08		 d
yr
n .2439868718624746 1.1236e-09 deg/d
Q 2.638545896108057 8.1008e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2781  
   data-arc span      37505 days (102.68 yr)  
   first obs. used      1918-03-16  
   last obs. used      2020-11-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41946  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:55:29  

Additional Information
 Earth MOID = 1.45563 au 
 Jupiter MOID = 2.40545 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 11.79   n/a E2021B10  
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. 2020-October); 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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