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18796 Acosta (1999 JH64)
Classification: Main-belt Asteroid          SPK-ID: 2018796
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1584990231787709 2.8044e-08  
a 2.285045293793045 7.6181e-09 au
q 1.9228678468076 6.2878e-08 au
i 5.750670123107999 3.0422e-06 deg
node 63.60491283694889 3.6428e-05 deg
peri 161.7169559003119 3.8084e-05 deg
M 103.3236059984722 1.1835e-05 deg
tp 2458838.392349735371
(2019-Dec-20.89234974)
4.1186e-05 TDB
period 1261.655096485831
3.45
6.3093e-06
1.727e-08
d
yr
n .2853394727312805 1.4269e-09 deg/d
Q 2.64722274077849 8.8256e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1388  
   data-arc span      13012 days (35.62 yr)  
   first obs. used      1985-04-23  
   last obs. used      2020-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52532  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:40:07  

Additional Information
 Earth MOID = .913024 au 
 Jupiter MOID = 2.33295 au 
 T_jup = 3.579 
[ 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 15.17   n/a E2021B10  
diameter diameter 3.768 km 0.585 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.17 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:
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]
geometric albedo albedo 0.150   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18796 Acosta           Discovered 1999 May 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Iyen Abdon Acosta (b. 1986) was awarded third place in the 2003 Intel International Science and Engineering Fair for her environmental science project. She attends the Oxon Hill High School, Oxon Hill, Maryland, 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

Alternate Designations
 1999 JH64 = 1985 HM1 = 1993 TL31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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