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JPL Small-Body Database Browser
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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 | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2882183378037519 3.4984e-08  
a 2.636981805283462 1.3075e-08 au
q 1.876955292545925 9.5018e-08 au
i 12.22026408592753 4.5474e-06 deg
node 123.5029551146495 1.9491e-05 deg
peri 273.1865280320234 2.1234e-05 deg
M 180.2282681096596 1.0909e-05 deg
tp 2459781.548546155895
(2022-Jul-21.04854616)
5.0857e-05 TDB
period 1564.080590755162
4.28
1.1633e-05
3.185e-08
d
yr
n .2301671679374184 1.7119e-09 deg/d
Q 3.397008318020998 1.6844e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1957  
   data-arc span      13684 days (37.46 yr)  
   first obs. used      1982-07-21  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4942  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 23:59:29  

Additional Information
 Earth MOID = .930696 au 
 Jupiter MOID = 2.19214 au 
 T_jup = 3.306 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.0   n/a MPO473981  
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. 2019-January); 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

[ show close-approach data ]
Alternate Designations
 1998 DN20 = 1989 CG7 = 1999 JB84 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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