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JPL Small-Body Database Browser
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16000 Neilgehrels (1999 AW16)
Classification: Main-belt Asteroid          SPK-ID: 2016000
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1676721143279572 3.6219e-08  
a 2.402543021354323 7.3232e-09 au
q 1.999703553199965 8.6588e-08 au
i 2.187892977682552 5.1852e-06 deg
node 174.8105387383627 8.1721e-05 deg
peri 50.81758566848113 8.293e-05 deg
M 73.60918394755492 1.4186e-05 deg
tp 2458322.378419404540
(2018-Jul-22.87841940)
5.3296e-05 TDB
period 1360.207567111488
3.72
6.2191e-06
1.703e-08
d
yr
n .2646654883449072 1.2101e-09 deg/d
Q 2.805382489508681 8.5511e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1497  
   data-arc span      10106 days (27.67 yr)  
   first obs. used      1992-03-25  
   last obs. used      2019-11-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50819  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 23:28:10  

Additional Information
 Earth MOID = .991377 au 
 Jupiter MOID = 2.17598 au 
 T_jup = 3.505 
[ 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 14.7   n/a MPO449067  
diameter diameter 2.729 km 0.510 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.343   0.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16000 Neilgehrels           Discovered 1999 Jan. 10 by Spacewatch at Kitt Peak.
Neil Gehrels (1952) is an astrophysicist who has worked to develop gamma-ray astronomy into a full astronomical discipline. He is the Principal Investigator for the Swift Gamma-Ray Burst Mission (launched Nov. 2004) and was Project Scientist for the Compton Gamma Ray Observatory (1991-2000).
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2015-03-05Last Updated: 2015-03-09

Alternate Designations
 1999 AW16 = 1992 GL1 = 1993 RK17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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