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18584 (1997 YB2)
Classification: Main-belt Asteroid          SPK-ID: 2018584
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1077672145437849 3.1194e-08  
a 2.230944802729899 7.7092e-09 au
q 1.990522095538764 7.0813e-08 au
i 1.850036836283817 3.6859e-06 deg
node 281.0315249696532 0.00012765 deg
peri 350.4599853413862 0.00012941 deg
M 98.99813152665062 2.2559e-05 deg
tp 2458665.799653581517
(2019-Jul-01.29965358)
7.592e-05 TDB
period 1217.115139978344
3.33
6.3087e-06
1.727e-08
d
yr
n .2957813835151254 1.5331e-09 deg/d
Q 2.471367509921033 8.54e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1520  
   data-arc span      10087 days (27.62 yr)  
   first obs. used      1992-04-05  
   last obs. used      2019-11-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52226  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:29:44  

Additional Information
 Earth MOID = .974312 au 
 Jupiter MOID = 2.60144 au 
 T_jup = 3.634 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456141.5 (2012-Aug-02.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1085022502999851 3.1251e-08  
q 1.989213857929122 7.1044e-08 au
tp 2456230.514164575959
(2012-Oct-30.01416458)
7.3923e-05 TDB
node 281.1084207642407 0.00012756 deg
peri 350.3227585865428 0.0001293 deg
i 1.850719283064872 3.6862e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1520  
   data-arc span      10087 days (27.62 yr)  
   first obs. used      1992-04-05  
   last obs. used      2019-11-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52226  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:29:44  

Additional Information
 Jupiter MOID = 2.60144 au 
 T_jup = 3.634 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.765956940434524E-16 -2.209864300852092E-15 3.081475948544483E-13 3.415399149678559E-15 9.632019957088775E-14 9.765289085315517E-17
q -2.209864300852092E-15 5.047294288581335E-15 -6.772594565295666E-13 -7.834244712802666E-15 -2.143169367072415E-13 -1.631732258240237E-16
tp 3.081475948544483E-13 -6.772594565295666E-13 5.464537389634311E-9 -1.25136067954801E-12 1.577684315975308E-9 4.645608191234189E-13
node 3.415399149678559E-15 -7.834244712802666E-15 -1.25136067954801E-12 1.627190182695466E-8 -1.626321234086692E-8 9.965917302603116E-11
peri 9.632019957088775E-14 -2.143169367072415E-13 1.577684315975308E-9 -1.626321234086692E-8 1.671725159138214E-8 -9.946842078480226E-11
i 9.765289085315517E-17 -1.631732258240237E-16 4.645608191234189E-13 9.965917302603116E-11 -9.946842078480226E-11 1.358829493190037E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.0   n/a MPO439222  
rotation period rot_per 26.159 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

18584 (1997 YB2)          Discovered 1997-Dec-21 by Kobayashi, T. at Oizumi
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 YB2 = 1992 GQ6 = 1996 PT6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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