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18881 (1999 XL195)
Classification: Main-belt Asteroid          SPK-ID: 2018881
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 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09647419770328197 1.8654e-08  
a 2.565418991024744 1.0576e-08 au
q 2.317922252092869 5.1921e-08 au
i 14.23373271055225 4.7851e-07 deg
node 311.1916032145221 2.714e-06 deg
peri 291.6695576560757 6.7063e-06 deg
M 253.9168276590489 9.5015e-06 deg
tp 2459642.762261830276
(2022-Mar-04.26226183)
4.068e-05 TDB
period 1500.845145799226
4.11
9.2811e-06
2.541e-08
d
yr
n .2398648528181726 1.4833e-09 deg/d
Q 2.812915729956619 1.1597e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2769  
   data-arc span      15032 days (41.16 yr)  
   first obs. used      1980-01-24  
   last obs. used      2021-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41239  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:48:47  

Additional Information
 Earth MOID = 1.34301 au 
 Jupiter MOID = 2.40468 au 
 T_jup = 3.383 
[ 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 12.69   n/a E2021B10  
diameter diameter 9.038 km 0.070 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 2.98 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Kim, M.-J.; Choi, Y.-J.; Moon, H.-K.; Byun, Y.-I.; et al. (2014) Astron. J. 147, A56.]
geometric albedo albedo 0.197   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

18881 (1999 XL195)          Discovered 1999-Dec-12 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XL195 = 1980 BS2 = 1998 QF77 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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