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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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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0915660849021963 3.2722e-08  
a 2.764655404348463 1.0398e-08 au
q 2.511506732868576 9.084e-08 au
i 2.870197002289187 3.4045e-06 deg
node 112.1931103858115 7.0449e-05 deg
peri 123.6015893534961 7.283e-05 deg
M 85.0170090517806 1.8064e-05 deg
tp 2458603.981678617351
8.4505e-05 TDB
period 1679.035728142494
n .2144087787805835 1.2096e-09 deg/d
Q 3.017804075828351 1.135e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2789  
   data-arc span      16760 days (45.89 yr)  
   first obs. used      1974-09-14  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43956  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:58:29  

Additional Information
 Earth MOID = 1.50117 au 
 Jupiter MOID = 1.97575 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 12.3   n/a MPO395023  
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. 2019-August); 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 Macias, A.; Licandro, J.; Serra-Ricart, M. (2019) Minor Planet Bull. 46-4, in press.]
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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1952-Mar-19 00:37 < 00:01 Jupiter 1.97509616635803 1.97509588590762 1.97509644680845 2.85913117562504 2.7049821668042 2434090.525981956 0.974669831945654 60.9179470067269 6.85808765009001 89.7282777690772 4182760.16780155 T 47 CATAB v2.0f-lin.ifort 2020-Aug-24 22:58:42 2020-Aug-24 22:58
2012-May-17 19:28 < 00:01 Jupiter 1.98805592356437 1.98805564453188 1.98805620259674 2.79680411486106 2.64007611623271 2456065.310988798 0.129551291045064 34.2839900114716 6.54149260118568 89.3909426150046 4123509.44047862 T 47 CATAB v2.0f-lin.ifort 2020-Aug-24 22:58:42 2020-Aug-24 22:58
2094-Dec-10 06:12 00:01 Jupiter 1.97265994188795 1.97265965618378 1.97266022759213 2.79583495979474 2.63778909460958 2486221.758632909 1.28882870587951 68.9171933100204 6.35606307221963 -89.8980744390595 4100741.88542322 T 47 CATAB v2.0f-lin.ifort 2020-Aug-24 22:58:42 2020-Aug-24 22:58
2177-Jul-04 21:20 00:03 Jupiter 1.99674854966056 1.99674797086833 1.99674912845585 2.96908906568228 2.82260307092775 2516378.388549610 2.57680224680571 150.004118393985 8.31576199226642 -84.5990202810472 4197634.08526156 T 47 CATAB v2.0f-lin.ifort 2020-Aug-24 22:58:42 2020-Aug-24 22:58

Alternate Designations
 1982 HN1 = 1950 JG = 1974 RN1 = 1977 DL10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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