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48944 (1998 QT13)
Classification: Main-belt Asteroid          SPK-ID: 2048944
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2472945624246354 4.1831e-08  
a 2.324075748579674 9.553e-09 au
q 1.749344453292957 9.5744e-08 au
i 2.243348862160669 3.8656e-06 deg
node 149.5232881924989 0.00010696 deg
peri 246.6861561663515 0.00010723 deg
M 255.7069609706942 6.8773e-06 deg
tp 2458975.409691479245
(2020-May-05.90969148)
2.506e-05 TDB
period 1294.117902678077
3.54
7.9791e-06
2.185e-08
d
yr
n .2781817632342523 1.7152e-09 deg/d
Q 2.898807043866392 1.1915e-08 au
  Orbit Determination Parameters
   # obs. used (total)      916  
   data-arc span      9747 days (26.69 yr)  
   first obs. used      1991-09-05  
   last obs. used      2018-05-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54163  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 00:34:03  

Additional Information
 Earth MOID = .757182 au 
 Jupiter MOID = 2.52993 au 
 T_jup = 3.533 
[ 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 15.6   n/a MPO385129  
diameter diameter 1.855 km 0.356 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.30 h n/a LCDB (Rev. 2019-January); 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.186   0.139 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

48944 (1998 QT13)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 QT13 = 1991 RU30 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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