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18958 (2000 QL128)
Classification: Outer Main-belt Asteroid          SPK-ID: 2018958
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1843122308292777 1.4738e-08  
a 3.400535529809115 1.8392e-08 au
q 2.773775240295778 5.5659e-08 au
i 14.13173337937227 4.5089e-07 deg
node 46.35068038687811 4.2748e-06 deg
peri 290.9488785938835 6.6916e-06 deg
M 123.7328688492197 8.5668e-06 deg
tp 2458413.269369329113
(2018-Oct-21.76936933)
5.308e-05 TDB
period 2290.442545116066
6.27
1.8582e-05
5.087e-08
d
yr
n .1571748659522727 1.2751e-09 deg/d
Q 4.027295819322453 2.1782e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3193  
   data-arc span      14353 days (39.30 yr)  
   first obs. used      1981-11-23  
   last obs. used      2021-03-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40415  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:43:07  

Additional Information
 Earth MOID = 1.80401 au 
 Jupiter MOID = 1.66395 au 
 T_jup = 3.071 
[ 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 12.28   n/a E2021B10  
diameter diameter 15.139 km 0.441 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.170 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[McNeill, A.; Mommert, M.; Trilling, D.E.; Llama, J.; Skiff, B. (2019) Ap. J. Suppl. Series 245, id.29.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.134   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18958 (2000 QL128)          Discovered 2000-Aug-24 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2000 QL128 = 1981 WY1 = 1987 SQ29 = 1987 UG9 = 1998 KP22 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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