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100995 (1998 QA40)
Classification: Main-belt Asteroid          SPK-ID: 2100995
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2457984416739437 3.4955e-08  
a 2.477452351713238 1.0442e-08 au
q 1.868498424340677 8.598e-08 au
i 5.221231368307354 3.9536e-06 deg
node 164.1395120929386 5.053e-05 deg
peri 168.8048575549949 5.2289e-05 deg
M 212.1872383214753 1.7638e-05 deg
tp 2459585.311390919376
(2022-Jan-05.81139092)
7.2662e-05 TDB
period 1424.316130354548
3.90
9.0049e-06
2.465e-08
d
yr
n .2527528772073844 1.598e-09 deg/d
Q 3.086406279085799 1.3009e-08 au
  Orbit Determination Parameters
   # obs. used (total)      678  
   data-arc span      7888 days (21.60 yr)  
   first obs. used      1998-08-17  
   last obs. used      2020-03-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56456  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:03:02  

Additional Information
 Earth MOID = .858688 au 
 Jupiter MOID = 2.29938 au 
 T_jup = 3.432 
[ 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 16.08   n/a E2021B55  
diameter diameter 4.176 km 0.973 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.042   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

100995 (1998 QA40)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1998 QA40 = 2002 PZ43 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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