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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456236.5 (2012-Nov-05.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04108354785662127 2.7361e-08  
q 2.430486715385711 6.9696e-08 au
tp 2456838.052368414631
(2014-Jun-29.55236841)
0.00029217 TDB
node 35.60525539673318 4.184e-05 deg
peri 65.80271566192124 8.455e-05 deg
i 4.786632060477053 4.4934e-06 deg
  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
 Jupiter MOID = 2.40545 au 
 T_jup = 3.442 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.486271510733585E-16 -1.896532101515351E-15 -3.004103254330459E-13 -4.367950067056737E-15 -8.529165378704708E-14 1.71625698007685E-16
q -1.896532101515351E-15 4.857592847414815E-15 5.455944803414432E-13 1.112866737912807E-14 1.551866519325381E-13 -2.734602606159388E-16
tp -3.004103254330459E-13 5.455944803414432E-13 8.536612305055846E-8 -8.070872836845569E-11 2.147681266805368E-8 -1.500322704893067E-11
node -4.367950067056737E-15 1.112866737912807E-14 -8.070872836845569E-11 1.750564107367558E-9 -1.764179240062606E-9 -6.600929945234262E-11
peri -8.529165378704708E-14 1.551866519325381E-13 2.147681266805368E-8 -1.764179240062606E-9 7.148777794689928E-9 6.202653413790739E-11
i 1.71625698007685E-16 -2.734602606159388E-16 -1.500322704893067E-11 -6.600929945234262E-11 6.202653413790739E-11 2.019030347110734E-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 11.79   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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2165-May-30 13:18 00:01 Thisb 0.0422645450134105 0.042259094736081 0.0422699984719832 4.28930205278018 4.28930201516944 2511960.053860354 1.37916744283484 643.033893675695 35.128139916605 65.1900066009469 163347.71103927 T 40 CATAB v2.0f-lin.ifort 2021-Feb-24 00:55:37 2021-Feb-24 00:55
2186-May-07 04:17 00:02 Amphi 0.0334938218394699 0.0334797839499479 0.0335078601196396 1.41095402890162 1.41095390725628 2519606.678168090 2.41513583980496 718.966868116134 29.7447211518336 -14.3100470503444 42006.3410425281 T 40 CATAB v2.0f-lin.ifort 2021-Feb-24 00:55:37 2021-Feb-24 00:55
2196-May-13 19:13 00:02 Amphi 0.0458209481133068 0.0458054265460272 0.0458364697848686 1.43756294775227 1.43756286047882 2523266.300545536 2.34319303648024 777.236800490001 24.5636342791889 -7.63120471770852 37922.3655858502 T 40 CATAB v2.0f-lin.ifort 2021-Feb-24 00:55:37 2021-Feb-24 00:55

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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