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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1927493414102912 4.1288e-08  
a 2.635744745169621 9.9044e-09 au
q 2.12770668141254 1.1235e-07 au
i 2.992429854429421 4.3706e-06 deg
node 344.3932453853464 6.8279e-05 deg
peri 338.9450305413715 6.9065e-05 deg
M 331.7610052374196 8.8844e-06 deg
tp 2459123.102741924489
(2020-Sep-30.60274192)
3.8499e-05 TDB
period 1562.980108318235
4.28
8.8098e-06
2.412e-08
d
yr
n .2303292268942307 1.2983e-09 deg/d
Q 3.143782808926701 1.1813e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1483  
   data-arc span      10915 days (29.88 yr)  
   first obs. used      1990-12-12  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5058  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:57:45  

Additional Information
 Earth MOID = 1.11581 au 
 Jupiter MOID = 2.18638 au 
 T_jup = 3.369 
[ 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 14.7   n/a MPO384860  
rotation period rot_per 2.53 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:
[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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