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185704 (1998 OD8)
Classification: Main-belt Asteroid          SPK-ID: 2185704
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2609086324332794 6.9651e-08  
a 2.342758396514276 1.3293e-08 au
q 1.731512507158154 1.671e-07 au
i 3.54591618696134 4.9126e-06 deg
node 277.756804629647 0.00011046 deg
peri 83.80980999570424 0.00011084 deg
M 5.060401021754242 9.8224e-06 deg
tp 2458982.089223092625
(2020-May-12.58922309)
3.5656e-05 TDB
period 1309.753843255203
3.59
1.1148e-05
3.052e-08
d
yr
n .2748608082762119 2.3394e-09 deg/d
Q 2.954004285870399 1.6762e-08 au
  Orbit Determination Parameters
   # obs. used (total)      514  
   data-arc span      10099 days (27.65 yr)  
   first obs. used      1991-09-14  
   last obs. used      2019-05-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49134  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 07:52:57  

Additional Information
 Earth MOID = .733133 au 
 Jupiter MOID = 2.52321 au 
 T_jup = 3.514 
[ show covariance matrix ]

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 16.3   n/a MPO436917  
diameter diameter 3.398 km 0.065 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.964 h n/a LCDB (Rev. 2019-August); 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.052   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

185704 (1998 OD8)          Discovered 1998-Jul-26 by Elst, E. W. at La Silla
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22

[ show close-approach data ]
Alternate Designations
 1998 OD8 = 1991 RX36 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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