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2052 Tamriko (1976 UN)
Classification: Main-belt Asteroid          SPK-ID: 2002052
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08430482894982372 3.6148e-08  
a 3.006153396333931 1.4529e-08 au
q 2.752720148459068 1.0661e-07 au
i 9.500827298061617 4.1154e-06 deg
node 213.853051758989 2.0591e-05 deg
peri 204.3535109598197 3.0164e-05 deg
M 169.7893417817486 2.3532e-05 deg
tp 2458102.610159821780
(2017-Dec-15.11015982)
0.0001222 TDB
period 1903.772869793324
5.21
1.3802e-05
3.779e-08
d
yr
n .189098187978213 1.3709e-09 deg/d
Q 3.259586644208795 1.5754e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2978  
   data-arc span      43018 days (117.78 yr)  
   first obs. used      1902-10-24  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42109  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:45:02  

Additional Information
 Earth MOID = 1.76712 au 
 Jupiter MOID = 2.10752 au 
 T_jup = 3.225 
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Orbital Elements at Epoch 2457063.5 (2015-Feb-10.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08523222443956961 3.6127e-08  
q 2.74968392533752 1.0657e-07 au
tp 2456202.657273672026
(2012-Oct-02.15727367)
0.00011745 TDB
node 213.8771998947595 2.0589e-05 deg
peri 205.1515025666002 2.9996e-05 deg
i 9.501764747082788 4.1159e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2978  
   data-arc span      43018 days (117.78 yr)  
   first obs. used      1902-10-24  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42109  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:45:02  

Additional Information
 Jupiter MOID = 2.10752 au 
 T_jup = 3.225 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.305141431057081E-15 -3.821406338075114E-15 -2.936358774344652E-13 -3.154821964805752E-15 -5.3458965723618E-14 6.283521255217846E-16
q -3.821406338075114E-15 1.135818419296181E-14 1.191526145891363E-12 8.866069945815544E-15 2.306149692227887E-13 -1.145603210098677E-15
tp -2.936358774344652E-13 1.191526145891363E-12 1.379550619110021E-8 -2.526364678677605E-12 2.572752154183831E-9 1.012043642632843E-12
node -3.154821964805752E-15 8.866069945815544E-15 -2.526364678677605E-12 4.238990171378774E-10 -4.183278659734438E-10 1.442849755936926E-12
peri -5.3458965723618E-14 2.306149692227887E-13 2.572752154183831E-9 -4.183278659734438E-10 8.99785976459337E-10 -1.14731194174677E-12
i 6.283521255217846E-16 -1.145603210098677E-15 1.012043642632843E-12 1.442849755936926E-12 -1.14731194174677E-12 1.694077506228093E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.5   n/a MPO473792 IRAS observations used: 3
diameter diameter 26.799 km 0.156 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.462 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:
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Sheridan, E.E. (2002) Minor Planet Bull. 29, 32-33.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D (2012) Minor Planet Bull. 39, 16-21.]
[Foylan, M. (2018) Minor Planet Bull. 45, 119-120.]
geometric albedo albedo 0.158   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.825   0.024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=8.78 deg.
U-B UB 0.433   0.041 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=8.78 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

2052 Tamriko (1976 UN)          Discovered 1976-Oct-24 by West, R. M. at La Silla
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1976 UN = 1928 TD = 1939 YA = 1942 JE = 1949 UV = 1951 CP1 = 1952 FL = 1952 HL2 = 1954 TS = 1975 WB2 = A902 UB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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