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17928 Neuwirth (1999 GJ21)
Classification: Main-belt Asteroid          SPK-ID: 2017928
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1581006251605993 1.8001e-08  
a 2.443341728485044 7.2638e-09 au
q 2.057047873730579 4.4431e-08 au
i 6.978212848796976 3.2355e-07 deg
node 34.68193342654162 6.5322e-06 deg
peri 319.7937116409307 6.0946e-06 deg
M 161.2480303391855 5.5956e-06 deg
tp 2458771.663109178589
(2019-Oct-15.16310918)
2.0841e-05 TDB
period 1395.001726362446
3.82
6.2208e-06
1.703e-08
d
yr
n .2580641967653492 1.1508e-09 deg/d
Q 2.829635583239508 8.4122e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2360  
   data-arc span      24412 days (66.84 yr)  
   first obs. used      1954-07-29  
   last obs. used      2021-05-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44924  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:31:32  

Additional Information
 Earth MOID = 1.05784 au 
 Jupiter MOID = 2.62367 au 
 T_jup = 3.473 
[ 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 13.73   n/a MPCxxxxx  
diameter diameter 4.316 km 0.251 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.198   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17928 Neuwirth           Discovered 1999 Apr. 15 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Melissa Marie Neuwirth (b. 1984) was awarded fourth place in the 2003 Intel International Science and Engineering Fair for her behavioral and social sciences team project. She attends the Francis Howell North High School, St. Charles, Missouri, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040614/MPCPages.arcLast Updated: 2009-12-11

Alternate Designations
 1999 GJ21 = 1954 OM = 1977 QY1 = 1981 SR1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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