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175898 (1999 XL185)
Classification: Main-belt Asteroid          SPK-ID: 2175898
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2015845654264074 4.7772e-08  
a 2.430924912997599 1.2216e-08 au
q 1.940887970826751 1.1886e-07 au
i 6.140233795077 4.248e-06 deg
node 318.2436656549585 5.8676e-05 deg
peri 132.8929390774574 6.0474e-05 deg
M 186.9715937063519 1.7309e-05 deg
tp 2459865.881390755057
(2022-Oct-13.38139076)
7.0005e-05 TDB
period 1384.38136143553
3.79
1.0435e-05
2.857e-08
d
yr
n .2600439517812485 1.9602e-09 deg/d
Q 2.920961855168448 1.4678e-08 au
  Orbit Determination Parameters
   # obs. used (total)      357  
   data-arc span      7502 days (20.54 yr)  
   first obs. used      1999-12-07  
   last obs. used      2020-06-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56644  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:07:17  

Additional Information
 Earth MOID = .963274 au 
 Jupiter MOID = 2.28303 au 
 T_jup = 3.472 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457284.5 (2015-Sep-19.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2023893363004924 4.7697e-08  
q 1.9385635935098 1.1862e-07 au
tp 2457099.593316357346
(2015-Mar-18.09331636)
5.723e-05 TDB
node 318.2875242547051 5.8677e-05 deg
peri 133.0971471689224 6.0454e-05 deg
i 6.141286637406925 4.2483e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      357  
   data-arc span      7502 days (20.54 yr)  
   first obs. used      1999-12-07  
   last obs. used      2020-06-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56644  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:07:17  

Additional Information
 Jupiter MOID = 2.28303 au 
 T_jup = 3.472 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.274990022607893E-15 -5.639871124341447E-15 -1.273501011247936E-12 -1.331589550499725E-14 -3.533165981814358E-13 -1.069392636251836E-15
q -5.639871124341447E-15 1.407141497721539E-14 3.352795304180545E-12 3.443852557100247E-14 9.232173401928762E-13 2.893103208792479E-15
tp -1.273501011247936E-12 3.352795304180545E-12 3.275239051727719E-9 1.278230808238124E-11 8.819305509647097E-10 1.738493337414951E-12
node -1.331589550499725E-14 3.443852557100247E-14 1.278230808238124E-11 3.443030174517965E-9 -3.41996098481606E-9 8.672691936583606E-12
peri -3.533165981814358E-13 9.232173401928762E-13 8.819305509647097E-10 -3.41996098481606E-9 3.654699897628184E-9 -8.181699379123297E-12
i -1.069392636251836E-15 2.893103208792479E-15 1.738493337414951E-12 8.672691936583606E-12 -8.181699379123297E-12 1.804784270322907E-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 16.6   n/a MPO417952  

175898 (1999 XL185)          Discovered 1999-Dec-12 by LINEAR at Socorro
Reference: 20080221/Numbers.arcLast Updated: 2008-02-22

Alternate Designations
 1999 XL185 = 2003 YD144 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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