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JPL Small-Body Database Browser
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4606 Saheki (1987 UM1)
Classification: Main-belt Asteroid          SPK-ID: 2004606
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1010719154942189 3.0934e-08  
a 2.252805968025163 6.8336e-09 au
q 2.025110553600052 6.9465e-08 au
i 2.633087314228747 3.5088e-06 deg
node 241.2445763087198 8.0591e-05 deg
peri 252.215268667468 8.2907e-05 deg
M 134.0843277074889 1.904e-05 deg
tp 2458540.498098549117
(2019-Feb-25.99809855)
6.5121e-05 TDB
period 1235.048773810339
3.38
5.6196e-06
1.539e-08
d
yr
n .2914864640441185 1.3263e-09 deg/d
Q 2.480501382450274 7.5243e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2466  
   data-arc span      24054 days (65.86 yr)  
   first obs. used      1953-08-16  
   last obs. used      2019-06-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43535  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:17:09  

Additional Information
 Earth MOID = 1.04119 au 
 Jupiter MOID = 2.5489 au 
 T_jup = 3.618 
[ 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 13.0   n/a MPO358675  
diameter diameter 6.712 km 0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.969 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Brinsfield, J.W. (2009) Minor Planet Bull. 36, 127-128.]
[Higgins, D.J. (2011) http://www.david-higgins.com/Astronomy/asteroid/lightcurves.htm]
[Hanus, J.; Broz, M.; Durech, J.; Warner, B.D.; et al. (2013) Astron. Astrophys. 559, A134.]
[Hanus, J.; Delbo, M.; Durech, J.; Ali-Lagoa, V. (2018) Icarus 309, 297-337.]
geometric albedo albedo 0.327   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4606 Saheki (1987 UM1)          Discovered 1987-Oct-27 by Seki, T. at Geisei
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1987 UM1 = 1972 GA1 = 1977 TJ7 = 1977 VF2 = 1982 FH4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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