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13894 (2039 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2013894
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05327929437569591 1.3839e-08  
a 2.358484719492439 7.3796e-09 au
q 2.232826317842021 3.1606e-08 au
i 6.590998622131873 7.2157e-07 deg
node 359.6333140871652 4.7752e-06 deg
peri 189.1250119110829 1.8039e-05 deg
M 188.0314598429154 1.6527e-05 deg
tp 2459832.467189106823
(2022-Sep-09.96718911)
6.18e-05 TDB
period 1322.964001849635
3.62
6.2092e-06
1.7e-08
d
yr
n .2721162476807262 1.2772e-09 deg/d
Q 2.484143121142858 7.7728e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2463  
   data-arc span      17313 days (47.40 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44925  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 00:11:44  

Additional Information
 Earth MOID = 1.23309 au 
 Jupiter MOID = 2.47419 au 
 T_jup = 3.542 
[ 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 14.17   n/a E2021B10  
rotation period rot_per 5.478 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

13894 (2039 T-2)          Discovered 1973-Sep-29 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20000222/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 2039 T-2 = 1998 QY18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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