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11716 Amahartman (1998 HY79)
Classification: Main-belt Asteroid          SPK-ID: 2011716
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1923720035530509 4.115e-08  
a 2.634634843221421 9.8075e-09 au
q 2.127804859800238 1.1176e-07 au
i 2.993203638411103 4.37e-06 deg
node 344.3818702301478 6.6813e-05 deg
peri 338.8928739835246 6.7616e-05 deg
M 17.8794365950741 8.7645e-06 deg
tp 2459122.923460616380
(2020-Sep-30.42346062)
3.8077e-05 TDB
period 1561.992964912398
4.28
8.7218e-06
2.388e-08
d
yr
n .2304747896352978 1.2869e-09 deg/d
Q 3.141464826642604 1.1694e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1564  
   data-arc span      10996 days (30.11 yr)  
   first obs. used      1990-12-12  
   last obs. used      2021-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50384  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:02:06  

Additional Information
 Earth MOID = 1.11394 au 
 Jupiter MOID = 2.18824 au 
 T_jup = 3.370 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.69   n/a E2021B10  
rotation period rot_per 2.53 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]

11716 Amahartman           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Amanda Nicole Hartman (b. 1987) is a finalist in the 2002 Intel International Science and Engineering Fair for her microbiology project. She attends the China Spring High School, China Spring, Texas, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020724/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1998 HY79 = 1995 WT25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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