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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 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04025444113915752 1.743e-08  
a 2.536442822648516 7.0525e-09 au
q 2.434339734341373 4.3532e-08 au
i 4.782595978577779 7.8264e-07 deg
node 35.43107944092625 5.2447e-06 deg
peri 65.55680740989045 1.5996e-05 deg
M 217.2035630787611 1.722e-05 deg
tp 2459785.762788550243
(2022-Jul-25.26278855)
7.1668e-05 TDB
period 1475.489223826353
4.04
6.1538e-06
1.685e-08
d
yr
n .2439868717349355 1.0176e-09 deg/d
Q 2.638545910955659 7.3364e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2824  
   data-arc span      37505 days (102.68 yr)  
   first obs. used      1918-03-16  
   last obs. used      2020-11-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42058  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:27:55  

Additional Information
 Earth MOID = 1.45563 au 
 Jupiter MOID = 2.40545 au 
 T_jup = 3.442 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456333.5 (2013-Feb-10.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04114922409518931 1.7571e-08  
q 2.430123789269655 4.3986e-08 au
tp 2456838.285436513671
(2014-Jun-29.78543651)
6.45e-05 TDB
node 35.60309601092379 5.2382e-06 deg
peri 65.8788202290751 1.5482e-05 deg
i 4.78667660226981 7.8294e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2824  
   data-arc span      37505 days (102.68 yr)  
   first obs. used      1918-03-16  
   last obs. used      2020-11-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42058  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:27:55  

Additional Information
 Jupiter MOID = 2.40545 au 
 T_jup = 3.442 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.087562840935418E-16 -7.643365418320331E-16 6.442691826699765E-13 3.423999911699282E-14 1.005081901505313E-13 -3.766784973405513E-17
q -7.643365418320331E-16 1.93474636941937E-15 -1.502295202415874E-12 -8.505178287258491E-14 -2.238825241992617E-13 2.622253873829743E-17
tp 6.442691826699765E-13 -1.502295202415874E-12 4.160267323151834E-9 4.428946016786595E-11 9.316228388537009E-10 7.902602331383806E-12
node 3.423999911699282E-14 -8.505178287258491E-14 4.428946016786595E-11 2.743923844478365E-11 -1.819496367236418E-11 -1.124936447359937E-12
peri 1.005081901505313E-13 -2.238825241992617E-13 9.316228388537009E-10 -1.819496367236418E-11 2.396820901476487E-10 3.143305897273783E-12
i -3.766784973405513E-17 2.622253873829743E-17 7.902602331383806E-12 -1.124936447359937E-12 3.143305897273783E-12 6.129881497591928E-13

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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