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15421 Adammalin (1998 HM81)
Classification: Main-belt Asteroid          SPK-ID: 2015421
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06978752594591153 4.1206e-08  
a 2.891539499498173 1.4722e-08 au
q 2.689746111653316 1.1901e-07 au
i 2.778302113695293 3.8686e-06 deg
node 55.79505263848323 9.3833e-05 deg
peri 280.7929642022623 9.7891e-05 deg
M 102.7560329336748 2.7204e-05 deg
tp 2458687.878343927871
(2019-Jul-23.37834393)
0.00013629 TDB
period 1795.941230088966
4.92
1.3716e-05
3.755e-08
d
yr
n .2004519936224008 1.5309e-09 deg/d
Q 3.09333288734303 1.575e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1415  
   data-arc span      9252 days (25.33 yr)  
   first obs. used      1995-10-15  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54487  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 00:57:29  

Additional Information
 Earth MOID = 1.68001 au 
 Jupiter MOID = 2.17113 au 
 T_jup = 3.285 
[ 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 14.33   n/a E2021B10  
rotation period rot_per 7.538 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.]

15421 Adammalin           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Adam Mikah Malin (b. 1985) was named a finalist in the 2003 Intel Science Talent Search, a science competition for high school seniors, for his behavioral and social sciences project. He attends the Syosset High School, Syosset, New York.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030216/MPCPages.arcLast Updated: 2011-11-22

[ show close-approach data ]
Alternate Designations
 1998 HM81 = 1996 BL13 = 1999 NX37 = 1999 PO8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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