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3922 Heather (1971 SP3)
Classification: Main-belt Asteroid          SPK-ID: 2003922
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2032803556432267 6.9008e-08  
a 3.134749899521541 2.7226e-08 AU
q 2.497516825094233 2.2108e-07 AU
i 2.013390129714907 6.9014e-06 deg
node 350.9587797961168 0.00015686 deg
peri 11.40381731323734 0.00015745 deg
M 284.9625479214371 1.6653e-05 deg
tp 2457423.050238148263
(2016-Feb-04.55023815)
9.6632e-05 JED
period 2027.228824002578
5.55
2.6411e-05
7.231e-08
d
yr
n .1775823211161792 2.3135e-09 deg/d
Q 3.77198297394885 3.2761e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1133  
   data-arc span      23897 days (65.43 yr)  
   first obs. used      1949-12-22  
   last obs. used      2015-05-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53837  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 15:45:37  

Additional Information
 Earth MOID = 1.49509 AU 
 T_jup = 3.179 
[ 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 12.7 mag n/a MPO263381  
diameter diameter 20.08 km 1.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
rotation period rot_per 5.0447 h n/a LCDB (Rev. 2015-July); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J., in press.]
geometric albedo albedo 0.0438   0.010 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2

3922 Heather           Discovered 1971 Sept. 26 by C. Torres at Cerro El Roble.
Named in honor of Heather Couper (b. 1949), British popularizer and promoter of astronomy, on the occasion of her 50th birthday, 1999 June 2. Former Gresham professor of astronomy and a past president of the British Astronomical Association, she regularly appears on radio and television and is the author of more than 25 books. As one of the nine Millennium Commissioners, she is responsible for allocating some 500 million GBP to public science projects in the U.K., including the National Space Centre in Leicester.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990728/MPCPages.arcLast Updated: 2010-06-11

[ show close-approach data ]
Alternate Designations
 1971 SP3 = 1954 SN = 1962 CU = 1971 UN4 = 1982 RH1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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