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3746 Heyuan (1964 TC1)
Classification: Main-belt Asteroid          SPK-ID: 2003746
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2497009808967311 1.2211e-08  
a 3.179628697145512 1.4191e-08 au
q 2.385672292580882 3.829e-08 au
i 1.027624180889481 8.3945e-07 deg
node 24.44644682190565 2.964e-05 deg
peri 304.1400082549936 2.989e-05 deg
M 353.8721240964671 3.9364e-06 deg
tp 2459235.750923560086
(2021-Jan-21.25092356)
2.2769e-05 TDB
period 2070.918648061164
5.67
1.3864e-05
3.796e-08
d
yr
n .1738358966138237 1.1638e-09 deg/d
Q 3.973585101710142 1.7735e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1978  
   data-arc span      31114 days (85.19 yr)  
   first obs. used      1935-09-28  
   last obs. used      2020-12-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5062  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:30:13  

Additional Information
 Earth MOID = 1.37275 au 
 Jupiter MOID = 1.39426 au 
 T_jup = 3.150 
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Orbital Elements at Epoch 2456552.5 (2013-Sep-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2494923706294846 1.2172e-08  
q 2.3839942268457 3.8267e-08 au
tp 2457171.409769239430
(2015-May-28.90976924)
1.9713e-05 TDB
node 24.53647884457439 2.9596e-05 deg
peri 304.8020676473609 2.9824e-05 deg
i 1.028868314575785 8.3959e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      1978  
   data-arc span      31114 days (85.19 yr)  
   first obs. used      1935-09-28  
   last obs. used      2020-12-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5062  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:30:13  

Additional Information
 Jupiter MOID = 1.39426 au 
 T_jup = 3.150 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.481543182720853E-16 -4.482568492252764E-16 6.416373748554252E-14 -1.472028355646941E-13 1.57364845261175E-13 5.28975840512327E-15
q -4.482568492252764E-16 1.464335656093473E-15 -2.263162794875308E-13 4.707326944770089E-13 -5.091036723375699E-13 -1.704046143095186E-14
tp 6.416373748554252E-14 -2.263162794875308E-13 3.885996047528746E-10 -3.065899283910967E-11 1.29404621497693E-10 -1.856664253708539E-12
node -1.472028355646941E-13 4.707326944770089E-13 -3.065899283910967E-11 8.759170873898309E-10 -8.697467062284023E-10 -1.832178523243284E-11
peri 1.57364845261175E-13 -5.091036723375699E-13 1.29404621497693E-10 -8.697467062284023E-10 8.894963170270734E-10 1.758626295497951E-11
i 5.28975840512327E-15 -1.704046143095186E-14 -1.856664253708539E-12 -1.832178523243284E-11 1.758626295497951E-11 7.049074690952256E-13

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 12.75   n/a E2021B10  
diameter diameter 15.202 km 0.640 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 16.3010 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.070   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

3746 Heyuan           Discovered 1964 Oct. 8 at the Purple Mountain Observatory.
The city of Heyuan is located in the Chinese northeastern province of Guangdong. Its Evergreen Lake is very famous, and the wealth of fossil dinosaur eggs discovered in Heyuan in 1996 has important scientific value.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000523/MPCPages.arcLast Updated: 2013-03-29

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Alternate Designations
 1964 TC1 = 1935 SD2 = 1976 YM5 = 1981 RS4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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