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18325 (1984 SB2)
Classification: Main-belt Asteroid          SPK-ID: 2018325
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1594622361843457 2.3833e-08  
a 2.55076887994601 1.0932e-08 au
q 2.14401757036038 6.3153e-08 au
i 26.34652501942637 8.2643e-07 deg
node 206.5928430093948 1.0315e-06 deg
peri 162.434508388559 6.1918e-06 deg
M 329.0014239200484 9.2741e-06 deg
tp 2459328.628085175312
(2021-Apr-24.12808518)
3.861e-05 TDB
period 1488.00740215111
4.07
9.566e-06
2.619e-08
d
yr
n .2419342803534262 1.5553e-09 deg/d
Q 2.957520189531639 1.2675e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1613  
   data-arc span      25377 days (69.48 yr)  
   first obs. used      1951-07-14  
   last obs. used      2021-01-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47677  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:26:34  

Additional Information
 Earth MOID = 1.15294 au 
 Jupiter MOID = 2.52514 au 
 T_jup = 3.279 
[ 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 13.62   n/a E2021B10  
diameter diameter 6.550 km 0.190 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.63782 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 0.197   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18325 (1984 SB2)          Discovered 1984-Sep-29 by Mrkos, A. at Klet
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1984 SB2 = 1999 KL5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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