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JPL Small-Body Database Browser
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21549 Carolinelang (1998 QJ44)
Classification: Main-belt Asteroid          SPK-ID: 2021549
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1539782962744536 3.5886e-08  
a 3.168375818433668 2.2551e-08 au
q 2.680514707954074 1.1741e-07 au
i 3.351579710104548 5.0731e-06 deg
node 23.59158106956933 6.9133e-05 deg
peri 250.1346643328457 7.1164e-05 deg
M 289.0308020127533 1.8091e-05 deg
tp 2459006.588656709474
(2020-Jun-06.08865671)
0.0001047 TDB
period 2059.934740162648
5.64
2.1992e-05
6.021e-08
d
yr
n .1747628179578034 1.8658e-09 deg/d
Q 3.656236928913261 2.6023e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1331  
   data-arc span      10247 days (28.05 yr)  
   first obs. used      1991-04-19  
   last obs. used      2019-05-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5365  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 03:00:39  

Additional Information
 Earth MOID = 1.66619 au 
 Jupiter MOID = 1.47607 au 
 T_jup = 3.182 
[ 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 13.7   n/a MPO263538  
diameter diameter 7.956 km 0.255 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.101   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21549 Carolinelang           Discovered 1998 Aug. 17 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Caroline Janet Lang (b. 1991) was awarded first place and Best in Category in the 2006 Intel International Science and Engineering Fair for her botany project. She attends the Independence Home School, Yardley, Pennsylvania, 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

[ show close-approach data ]
Alternate Designations
 1998 QJ44 = 1991 HP4 = 1999 XQ45 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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