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2774 Tenojoki (1942 TJ)
Classification: Main-belt Asteroid          SPK-ID: 2002774
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1403353992111017 3.5971e-08  
a 3.184879895748487 1.7508e-08 au
q 2.737928504139211 1.1488e-07 au
i 8.528166139951862 4.0505e-06 deg
node 290.9343883327692 2.7204e-05 deg
peri 108.0595245425792 3.1117e-05 deg
M 214.6873060069882 1.6737e-05 deg
tp 2459838.490450502067
(2022-Sep-15.99045050)
0.00010027 TDB
period 2076.050989703982
5.68
1.7118e-05
4.687e-08
d
yr
n .1734061455067302 1.4298e-09 deg/d
Q 3.631831287357763 1.9964e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2421  
   data-arc span      28521 days (78.09 yr)  
   first obs. used      1942-09-08  
   last obs. used      2020-10-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42779  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:06:11  

Additional Information
 Earth MOID = 1.76149 au 
 Jupiter MOID = 1.83576 au 
 T_jup = 3.166 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456906.5 (2014-Sep-06.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1418735763360204 3.5894e-08  
q 2.732031736178182 1.1451e-07 au
tp 2457766.293874051666
(2017-Jan-12.79387405)
9.0825e-05 TDB
node 290.9574859254327 2.7217e-05 deg
peri 108.6155740462129 3.1049e-05 deg
i 8.527916981049714 4.0503e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2421  
   data-arc span      28521 days (78.09 yr)  
   first obs. used      1942-09-08  
   last obs. used      2020-10-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42779  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:06:11  

Additional Information
 Jupiter MOID = 1.83576 au 
 T_jup = 3.166 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.288413216704576E-15 -4.073995866603392E-15 -5.308415398227551E-15 -5.804900307506719E-16 -3.080783405682945E-14 1.838967983335868E-18
q -4.073995866603392E-15 1.311237409133755E-14 5.714310340213313E-13 4.910523639681503E-15 1.689046608043827E-13 4.098536121860458E-16
tp -5.308415398227551E-15 5.714310340213313E-13 8.249254171913261E-9 4.706378265550303E-12 1.374712366927813E-9 -2.982330760979505E-14
node -5.804900307506719E-16 4.910523639681503E-15 4.706378265550303E-12 7.4076159135801E-10 -7.315555994573003E-10 7.286594992854154E-12
peri -3.080783405682945E-14 1.689046608043827E-13 1.374712366927813E-9 -7.315555994573003E-10 9.640116164824883E-10 -7.243886086918049E-12
i 1.838967983335868E-18 4.098536121860458E-16 -2.982330760979505E-14 7.286594992854154E-12 -7.243886086918049E-12 1.640461142853682E-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 11.3   n/a MPO347542  
diameter diameter 35.697 km 0.386 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 11.2 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. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.033   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2774 Tenojoki (1942 TJ)          Discovered 1942-Oct-03 by Oterma, L. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1942 TJ = 1948 TO1 = 1981 LE = 2000 XO55 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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