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3922 Heather (1971 SP3)
Classification: Main-belt Asteroid          SPK-ID: 2003922
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2019375543385671 2.1865e-08  
a 3.140002720761589 1.5257e-08 au
q 2.505918250714548 7.1984e-08 au
i 2.012571901572738 5.1433e-07 deg
node 350.8323320434738 1.6034e-05 deg
peri 10.59070624045691 1.7097e-05 deg
M 316.5634341485384 3.403e-06 deg
tp 2459445.714667971898
2.0298e-05 TDB
period 2032.326422207541
n .1771368989086719 1.291e-09 deg/d
Q 3.774087190808631 1.8338e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2048  
   data-arc span      25835 days (70.73 yr)  
   first obs. used      1949-12-22  
   last obs. used      2020-09-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4953  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:43:40  

Additional Information
 Earth MOID = 1.5015 au 
 Jupiter MOID = 1.68579 au 
 T_jup = 3.178 
[ 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 12.83   n/a E2021B10  
diameter diameter 13.979 km 0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 5.045 h n/a LCDB (Rev. 2020-October); 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. 150, A75.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.068   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

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 
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