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15967 Clairearmstrong (1998 DN20)
Classification: Main-belt Asteroid          SPK-ID: 2015967
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2881096247199324 2.3363e-08  
a 2.637945498548699 1.2036e-08 au
q 1.877928010930198 6.3844e-08 au
i 12.21997625685298 1.6838e-06 deg
node 123.5034337658605 9.9238e-06 deg
peri 273.0905292760673 1.4387e-05 deg
M 271.4899484697199 9.3566e-06 deg
tp 2459781.257635809183
(2022-Jul-20.75763581)
4.2506e-05 TDB
period 1564.938066315771
4.28
1.071e-05
2.932e-08
d
yr
n .2300410525814122 1.5744e-09 deg/d
Q 3.397962986167199 1.5504e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2369  
   data-arc span      14257 days (39.03 yr)  
   first obs. used      1982-07-21  
   last obs. used      2021-08-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47179  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:05:30  

Additional Information
 Earth MOID = .931048 au 
 Jupiter MOID = 2.19371 au 
 T_jup = 3.305 
[ 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 13.01   n/a MPO636304  
diameter diameter 14.430 km 0.156 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.897 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Brinsfield, J.W. (2010) Minor Planet Bull. 37, 50-53.]
[Warner, B.D. (2010) Minor Planet Bull. 37, 112-118.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.086   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

15967 Clairearmstrong           Discovered 1998 Feb. 24 by M. Armstrong at Rolvenden.
Claire Armstrong, the wife of supernova discoverer Mark Armstrong, has provided unwavering support throughout the years of Mark's patrol. A large degree of Mark's success is due to Claire's support, which extends to practical help also: she co-discovered minor planet 1997 WQ28 with him.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010109/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1998 DN20 = 1989 CG7 = 1999 JB84 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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