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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2472450291213538 4.0905e-08  
a 2.322888727230354 9.2071e-09 au
q 1.748566036220621 9.3553e-08 au
i 2.244052439437528 3.8208e-06 deg
node 149.5061534249273 0.00010522 deg
peri 246.8306696584219 0.00010549 deg
M 6.90799081459204 6.9754e-06 deg
tp 2458975.686370856174
(2020-May-06.18637086)
2.5028e-05 TDB
period 1293.126573490514
3.54
7.6882e-06
2.105e-08
d
yr
n .2783950213228225 1.6552e-09 deg/d
Q 2.897211418240087 1.1483e-08 au
  Orbit Determination Parameters
   # obs. used (total)      940  
   data-arc span      10638 days (29.13 yr)  
   first obs. used      1991-09-05  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5353  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:35:04  

Additional Information
 Earth MOID = .757064 au 
 Jupiter MOID = 2.53324 au 
 T_jup = 3.534 
[ 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-August); 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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