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2956 Yeomans (1982 HN1)
Classification: Main-belt Asteroid          SPK-ID: 2002956
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 55 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09148577792243988 1.7367e-08  
a 2.763806042461866 8.9742e-09 au
q 2.510957096640502 4.7346e-08 au
i 2.87022222221885 8.7434e-07 deg
node 112.1936319114654 1.0865e-05 deg
peri 123.3261662285492 1.7501e-05 deg
M 170.2586011104349 1.1081e-05 deg
tp 2458602.781816340285
5.0772e-05 TDB
period 1678.262033482576
n .2145076232541356 1.0448e-09 deg/d
Q 3.016654988283229 9.7952e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3334  
   data-arc span      17117 days (46.86 yr)  
   first obs. used      1974-09-14  
   last obs. used      2021-07-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41419  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 09:11:13  

Additional Information
 Earth MOID = 1.50104 au 
 Jupiter MOID = 1.97414 au 
 T_jup = 3.332 
[ 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 12.31   n/a E2021B10  
diameter diameter 9.350 km 0.183 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 3.4 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:
[Aznar, A. (2015) Minor Planet Bull. 42, 4-6.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Aznar, A.M.; Licandro, J.; Serra-Ricart, M. (2019) Minor Planet Bull. 46, 395-399.]
geometric albedo albedo 0.292   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
SMASSII spectral type spec_B Sr   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

2956 Yeomans           Discovered 1982 Apr. 28 by E. Bowell at the Anderson Mesa Station of the Lowell Observatory.
Named in honor of Donald K. Yeomans, celestial mechanician at the Jet Propulsion Laboratory and discipline specialist for the astrometric team of the International Halley Watch. Well known for his orbit determinations that take account of the nongravitational forces acting on comets, he has made a detailed study of the motion of Halley's Comet back to the year -1404 and has analyzed the orbits of meteor showers and their relation to the orbits of parent comets. Citation prepared by S. J. Edberg and Z. Sekanina.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC11158Last Updated: 2005-11-23

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Alternate Designations
 1982 HN1 = 1950 JG = 1974 RN1 = 1977 DL10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2021-Sep-24 12:25 UT
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