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JPL Small-Body Database Browser
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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 ]

[ 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 .06973622078768037 4.3263e-08  
a 2.890803806774656 1.5306e-08 au
q 2.689210074251552 1.2616e-07 au
i 2.778608628533883 3.9562e-06 deg
node 55.79650124160922 9.853e-05 deg
peri 280.5914754718947 0.00010263 deg
M 62.86265984444061 2.7855e-05 deg
tp 2458687.015114818074
(2019-Jul-22.51511482)
0.00013934 TDB
period 1795.255863254311
4.92
1.4258e-05
3.904e-08
d
yr
n .2005285192871716 1.5926e-09 deg/d
Q 3.09239753929776 1.6373e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1274  
   data-arc span      8809 days (24.12 yr)  
   first obs. used      1995-10-15  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56119  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 23:21:08  

Additional Information
 Earth MOID = 1.68133 au 
 Jupiter MOID = 2.17211 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 14.3   n/a MPO358780  
rotation period rot_per 7.538 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:
[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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