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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08341085391410627 1.5825e-08  
a 3.009373639533814 1.2532e-08 au
q 2.758359214513697 5.1511e-08 au
i 9.495853556347784 3.3927e-07 deg
node 213.8027390155535 1.4919e-06 deg
peri 203.8877571381166 1.2258e-05 deg
M 245.1600831805728 1.4227e-05 deg
tp 2460004.779197159817
(2023-Mar-01.27919716)
7.665e-05 TDB
period 1906.832720210485
5.22
1.1911e-05
3.261e-08
d
yr
n .188794746484244 1.1793e-09 deg/d
Q 3.260388064553931 1.3578e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3291  
   data-arc span      43343 days (118.67 yr)  
   first obs. used      1902-10-24  
   last obs. used      2021-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42353  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 13:06:08  

Additional Information
 Earth MOID = 1.77207 au 
 Jupiter MOID = 2.10896 au 
 T_jup = 3.224 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457331.5 (2015-Nov-05.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08501953323452642 1.5684e-08  
q 2.750877884990649 5.1216e-08 au
tp 2458106.157486325578
(2017-Dec-18.65748633)
7.2475e-05 TDB
node 213.8731422635181 1.4907e-06 deg
peri 205.1066707285451 1.2164e-05 deg
i 9.500642103631785 3.3957e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3291  
   data-arc span      43343 days (118.67 yr)  
   first obs. used      1902-10-24  
   last obs. used      2021-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42353  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 13:06:08  

Additional Information
 Jupiter MOID = 2.10896 au 
 T_jup = 3.224 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.459992101107719E-16 -7.829504628857315E-16 -5.371945050800195E-13 1.67990419434493E-14 -9.615423195466487E-14 2.75568084546698E-15
q -7.829504628857315E-16 2.623082095644132E-15 1.795891464648166E-12 -5.066836466749536E-14 3.071580959031648E-13 -8.333174954035664E-15
tp -5.371945050800195E-13 1.795891464648166E-12 5.252670536368247E-9 -4.217062601525695E-11 8.750010878206264E-10 -8.945639646845119E-12
node 1.67990419434493E-14 -5.066836466749536E-14 -4.217062601525695E-11 2.22228320928537E-12 -8.424269681031231E-12 1.652918340137063E-13
peri -9.615423195466487E-14 3.071580959031648E-13 8.750010878206264E-10 -8.424269681031231E-12 1.479623863639884E-10 -1.549856749489896E-12
i 2.75568084546698E-15 -8.333174954035664E-15 -8.945639646845119E-12 1.652918340137063E-13 -1.549856749489896E-12 1.153065008086509E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.66   n/a E2021B10 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. 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:
[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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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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