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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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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08430482895165703 3.6151e-08  
a 3.006153396320717 1.4574e-08 au
q 2.752720148441457 1.0661e-07 au
i 9.500827312581707 4.128e-06 deg
node 213.8530516079839 2.088e-05 deg
peri 204.353511206418 3.0509e-05 deg
M 169.7893417010483 2.3657e-05 deg
tp 2458102.610160254464
0.00012293 TDB
period 1903.772869780772
n .1890981879794598 1.3752e-09 deg/d
Q 3.259586644199978 1.5803e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2867  
   data-arc span      42970 days (117.65 yr)  
   first obs. used      1902-10-24  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42854  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:40:28  

Additional Information
 Earth MOID = 1.76712 au 
 Jupiter MOID = 2.10752 au 
 T_jup = 3.225 
[ 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 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] (  
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,]
[Sheridan, E.E. (2002) Minor Planet Bull. 29, 32-33.]
[Behrend, R. (2006) Observatoire de Geneve web site,]
[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] (  
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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