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21001 Trogrlic (1987 GF)
Classification: Mars-crossing Asteroid          SPK-ID: 2021001
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3195333195642672 3.1103e-08  
a 2.330021017720296 8.2017e-09 au
q 1.585501667273618 7.0537e-08 au
i 21.52104099435993 5.2838e-06 deg
node 177.6268536981378 9.8628e-06 deg
peri 293.2165303070934 1.3246e-05 deg
M 156.8790887994346 8.0887e-06 deg
tp 2458434.390110044151
(2018-Nov-11.89011004)
2.8389e-05 TDB
period 1299.086844166067
3.56
6.8592e-06
1.878e-08
d
yr
n .2771177320567029 1.4632e-09 deg/d
Q 3.074540368166975 1.0822e-08 au
  Orbit Determination Parameters
   # obs. used (total)      921  
   data-arc span      23853 days (65.31 yr)  
   first obs. used      1955-03-24  
   last obs. used      2020-07-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50906  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:59:29  

Additional Information
 Earth MOID = .708195 au 
 Jupiter MOID = 2.32535 au 
 T_jup = 3.413 
[ 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 15.2   n/a MPO474042  
rotation period rot_per 6.18659 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.]

21001 Trogrlic           Discovered 1987 Apr. 1 by A. Maury at Palomar.
The Trogrlic family includes Yvan (1908-1970), Marie (1912-1994) and their children Jean (b. 1934), Emilienne (b. 1935), Yvonne (b. 1937) and Liliane (1938-1972), who are, respectively, grandfather, grandmother, uncle, mother and aunts of the discoverer.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030614/MPCPages.arcLast Updated: 2005-04-26

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Alternate Designations
 1987 GF = 2000 WJ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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