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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 ]

[ show orbit diagram ]
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
(2017-Dec-15.11016025)
0.00012293 TDB
period 1903.772869780772
5.21
1.3845e-05
3.791e-08
d
yr
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457017.5 (2014-Dec-26.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0852643559055879 3.6131e-08  
q 2.749513551876967 1.0659e-07 au
tp 2456202.707759285537
(2012-Oct-02.20775929)
0.00011827 TDB
node 213.8773130430604 2.0877e-05 deg
peri 205.1529873837164 3.0333e-05 deg
i 9.501904994158883 4.1286e-06 deg
  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
 Jupiter MOID = 2.10752 au 
 T_jup = 3.225 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.305456679585044E-15 -3.822072958730678E-15 -2.97581407146088E-13 -2.474856435694788E-15 -5.495028648392651E-14 5.66108839560072E-16
q -3.822072958730678E-15 1.136045528560748E-14 1.18676378623426E-12 6.843714329211328E-15 2.316571178967607E-13 -9.596526292163007E-16
tp -2.97581407146088E-13 1.18676378623426E-12 1.398877091013855E-8 -3.569479669550261E-12 2.613702129764393E-9 1.095212218248513E-12
node -2.474856435694788E-15 6.843714329211328E-15 -3.569479669550261E-12 4.358581008923556E-10 -4.303306810619136E-10 3.329277493476392E-13
peri -5.495028648392651E-14 2.316571178967607E-13 2.613702129764393E-9 -4.303306810619136E-10 9.200664057480779E-10 -3.597377227363361E-14
i 5.66108839560072E-16 -9.596526292163007E-16 1.095212218248513E-12 3.329277493476392E-13 -3.597377227363361E-14 1.704537204557645E-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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