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4675 Ohboke (1990 SD)
Classification: Main-belt Asteroid          SPK-ID: 2004675
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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .17526442057153 1.2162e-08  
a 2.410950883450115 6.9893e-09 au
q 1.988396973835812 2.8474e-08 au
i 4.47248280462891 5.9079e-07 deg
node 294.4731993283183 7.4524e-06 deg
peri 294.1400517790025 8.5413e-06 deg
M 205.0205622811496 5.2433e-06 deg
tp 2459985.143769176942
(2023-Feb-09.64376918)
2.1117e-05 TDB
period 1367.354018202919
3.74
5.9459e-06
1.628e-08
d
yr
n .2632822189480523 1.1449e-09 deg/d
Q 2.833504793064418 8.2143e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3625  
   data-arc span      24076 days (65.92 yr)  
   first obs. used      1955-04-20  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40163  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 14:29:18  

Additional Information
 Earth MOID = .983739 au 
 Jupiter MOID = 2.17993 au 
 T_jup = 3.494 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457175.5 (2015-Jun-02.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1747784453180599 1.2183e-08  
q 1.989903136996388 2.8534e-08 au
tp 2457250.099095563571
(2015-Aug-15.59909556)
1.8223e-05 TDB
node 294.5087694091405 7.4552e-06 deg
peri 294.1645966386106 8.5461e-06 deg
i 4.470817971403932 5.9049e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3625  
   data-arc span      24076 days (65.92 yr)  
   first obs. used      1955-04-20  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40163  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 14:29:18  

Additional Information
 Jupiter MOID = 2.17993 au 
 T_jup = 3.494 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.484224562213514E-16 -3.407829524399689E-16 -8.924587114401655E-14 -9.596611341443247E-15 -8.161528606724392E-15 -2.964782157327735E-16
q -3.407829524399689E-16 8.142068021885703E-16 2.084129046730743E-13 2.206657532410374E-14 1.882290707843821E-14 6.770030854456664E-16
tp -8.924587114401655E-14 2.084129046730743E-13 3.320926321639651E-10 2.575101653072584E-11 7.620674764085752E-11 2.056197537305407E-12
node -9.596611341443247E-15 2.206657532410374E-14 2.575101653072584E-11 5.558033580275789E-11 -4.805927149949173E-11 4.164943149173968E-12
peri -8.161528606724392E-15 1.882290707843821E-14 7.620674764085752E-11 -4.805927149949173E-11 7.303602781196633E-11 -3.609482899268573E-12
i -2.964782157327735E-16 6.770030854456664E-16 2.056197537305407E-12 4.164943149173968E-12 -3.609482899268573E-12 3.486809261754441E-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 13.21   n/a E2021B10  
diameter diameter 4.003 km 0.676 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.02644 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.836   0.158 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4675 Ohboke (1990 SD)          Discovered 1990-Sep-19 by Seki, T. at Geisei
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1990 SD = 1970 CM = 1975 TX = 1981 DB4 = 1983 VK2 = 1986 RJ2 = 1986 RR6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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