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19454 Henrymarr (1998 FX127)
Classification: Main-belt Asteroid          SPK-ID: 2019454
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1315618384349478 3.3197e-08  
a 2.353819562107342 8.0947e-09 au
q 2.044146733172356 7.7132e-08 au
i 7.128460302262861 3.6072e-06 deg
node 139.0724432721203 2.6822e-05 deg
peri 256.0784610874871 2.9564e-05 deg
M 228.9155962562047 1.246e-05 deg
tp 2459680.793490762916
(2022-Apr-11.29349076)
4.6312e-05 TDB
period 1319.0406466096
3.61
6.8042e-06
1.863e-08
d
yr
n .2729256304006454 1.4079e-09 deg/d
Q 2.663492391042327 9.1596e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1761  
   data-arc span      11186 days (30.63 yr)  
   first obs. used      1989-11-28  
   last obs. used      2020-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52679  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:08:41  

Additional Information
 Earth MOID = 1.06287 au 
 Jupiter MOID = 2.76292 au 
 T_jup = 3.534 
[ 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 14.49   n/a E2021B10  
diameter diameter 2.625 km 0.472 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 14.5365 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.371   0.097 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19454 Henrymarr           Discovered 1998 Mar. 25 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Henry Louis Marr (b. 1985) was awarded fourth place in the 2003 Intel International Science and Engineering Fair for his medicine and health project. He attends the Alhambra High School, Alhambra, California, 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: 20040830/MPCPages.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1998 FX127 = 1989 WC7 = 1999 LY13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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