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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1674197359944437 3.6188e-08  
a 2.40278633510585 7.2656e-09 au
q 2.000512481231372 8.6469e-08 au
i 2.187705320840426 5.1755e-06 deg
node 174.8075196186271 8.1207e-05 deg
peri 50.81730169697227 8.2419e-05 deg
M 179.4931469070542 1.4322e-05 deg
tp 2458322.208260689171
(2018-Jul-22.70826069)		 5.3334e-05 TDB
period 1360.414201653857
3.72		 6.1705e-06
1.689e-08		 d
yr
n .2646252880647288 1.2003e-09 deg/d
Q 2.805060188980328 8.482e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1506  
   data-arc span      10148 days (27.78 yr)  
   first obs. used      1992-03-25  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51129  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 00:00:13  

Additional Information
 Earth MOID = .992123 au 
 Jupiter MOID = 2.17566 au 
 T_jup = 3.504 
[ 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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