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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04039712628221726 1.7483e-08  
a 2.534816779287953 7.0181e-09 au
q 2.432417465752774 4.3683e-08 au
i 4.784276412992105 7.8301e-07 deg
node 35.39340699407849 5.2394e-06 deg
peri 66.5785671628727 1.5815e-05 deg
M 264.0345833609766 1.7052e-05 deg
tp 2459789.443889094828
(2022-Jul-28.94388909)
7.0554e-05 TDB
period 1474.070608230077
4.04
6.1218e-06
1.676e-08
d
yr
n .2442216797418229 1.0143e-09 deg/d
Q 2.637216092823132 7.3016e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2845  
   data-arc span      37735 days (103.31 yr)  
   first obs. used      1918-03-16  
   last obs. used      2021-07-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4195  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 09:25:00  

Additional Information
 Earth MOID = 1.4542 au 
 Jupiter MOID = 2.40464 au 
 T_jup = 3.443 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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

Alternate Designations
 1938 BB = 1936 SB = 1951 KO = A918 FA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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