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

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2868311459228828 5.9808e-08  
a 2.64025950350185 2.3923e-08 AU
q 1.882950844578633 1.6299e-07 AU
i 12.22108249228928 7.1406e-06 deg
node 123.5365356454101 3.0142e-05 deg
peri 273.4680777127508 3.3294e-05 deg
M 79.77400477446758 1.2249e-05 deg
tp 2456653.262002732266
(2013-Dec-26.76200273)
5.2696e-05 JED
period 1566.997662581854
4.29
2.1298e-05
5.831e-08
d
yr
n .2297386962319065 3.1225e-09 deg/d
Q 3.397568162425067 3.0785e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1005  
   data-arc span      11911 days (32.61 yr)  
   first obs. used      1982-07-21  
   last obs. used      2015-03-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50414  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 14:44:34  

Additional Information
 Earth MOID = .936328 AU 
 T_jup = 3.305 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.8 mag n/a MPO267768  
diameter diameter 12.16 km 0.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
rotation period rot_per 5.897 h n/a LCDB (Rev. 2015-Feb); Warner et al., 2009 Published Reference List:
[Brinsfield, J.W. (2010) Minor Planet Bul. 37, 50-53.]
[Warner, B.D. (2010) Minor Planet Bul. 37, 112-118.]
geometric albedo albedo 0.1194   0.021 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3

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 | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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