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4799 Hirasawa (1989 TC1)
Classification: Main-belt Asteroid          SPK-ID: 2004799
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1281397722486182 3.8519e-08  
a 2.470410885731336 1.0075e-08 au
q 2.153852997473216 9.7874e-08 au
i .6165856827341157 3.5377e-06 deg
node 241.53765589 0.00037859 deg
peri 81.99146633974303 0.00037883 deg
M 5.270327604143215 1.4642e-05 deg
tp 2458979.737132786988
(2020-May-10.23713279)
5.7655e-05 TDB
period 1418.248116266694
3.88
8.6758e-06
2.375e-08
d
yr
n .253834287435996 1.5528e-09 deg/d
Q 2.786968773989457 1.1366e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2029  
   data-arc span      15323 days (41.95 yr)  
   first obs. used      1977-08-18  
   last obs. used      2019-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47485  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:22:09  

Additional Information
 Earth MOID = 1.14163 au 
 Jupiter MOID = 2.49967 au 
 T_jup = 3.473 
[ 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 13.8   n/a MPO384797  
diameter diameter 7.863 km 0.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.104   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4799 Hirasawa (1989 TC1)          Discovered 1989-Oct-08 by Mizuno and Furuta at Kani
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1989 TC1 = 1977 QM4 = 1985 TT2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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