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21488 Danyellelee (1998 HT150)
Classification: Main-belt Asteroid          SPK-ID: 2021488
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04410577825254376 3.7499e-08  
a 2.189488858825438 7.0747e-09 au
q 2.092919748731668 8.2189e-08 au
i 4.469741001943904 4.7384e-06 deg
node 120.9936721526103 5.3931e-05 deg
peri 94.97251596083602 7.8998e-05 deg
M 51.00306740586159 5.813e-05 deg
tp 2459228.848929217316
(2021-Jan-14.34892922)
0.00019099 TDB
period 1183.348150445359
3.24
5.7355e-06
1.57e-08
d
yr
n .3042215428016786 1.4745e-09 deg/d
Q 2.286057968919208 7.3867e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1079  
   data-arc span      17445 days (47.76 yr)  
   first obs. used      1973-09-29  
   last obs. used      2021-07-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57447  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:14:21  

Additional Information
 Earth MOID = 1.09114 au 
 Jupiter MOID = 2.67847 au 
 T_jup = 3.669 
[ 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 15.77   n/a E2020-QM5  
diameter diameter 2.155 km 0.807 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.219   0.159 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21488 Danyellelee           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Danyelle Lee Evans (b. 1991) was awarded second place in the 2006 Intel International Science and Engineering Fair for her environmental sciences project. She attends the James Bowie High School, Austin, Texas, 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: 20060711/MPCPages.arcLast Updated: 2006-07-17

Alternate Designations
 1998 HT150 = 3267 T-2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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