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22838 Darcyhampton (1999 RF91)
Classification: Main-belt Asteroid          SPK-ID: 2022838
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07878362562030797 3.8299e-08  
a 2.780121696489505 1.3252e-08 au
q 2.56109362957438 1.0618e-07 au
i 4.890098143892096 4.3167e-06 deg
node 156.8206806338256 4.1664e-05 deg
peri 241.1533247106165 4.8973e-05 deg
M 176.2779928318733 2.5601e-05 deg
tp 2458371.432800356686
(2018-Sep-09.93280036)
0.00012003 TDB
period 1693.144941559755
4.64
1.2106e-05
3.314e-08
d
yr
n .2126220804630947 1.5202e-09 deg/d
Q 2.999149763404629 1.4296e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1377  
   data-arc span      16183 days (44.31 yr)  
   first obs. used      1976-10-22  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51787  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:13:39  

Additional Information
 Earth MOID = 1.57117 au 
 Jupiter MOID = 2.33018 au 
 T_jup = 3.324 
[ 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 14.64   n/a E2021B10  
diameter diameter 7.898 km 0.187 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.43971 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 0.049   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22838 Darcyhampton           Discovered 1999 Sept. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Darcy Hampton mentored a finalist in the 2006 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition. She teaches at the Alice Deal Junior High School, Washington, District of Columbia.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20061009/MPCPages.arcLast Updated: 2006-10-14

[ show close-approach data ]
Alternate Designations
 1999 RF91 = 1976 UZ15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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