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48981 (1998 QD45)
Classification: Main-belt Asteroid          SPK-ID: 2048981
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1255008626201265 3.78e-08  
a 2.3378360827605 8.9684e-09 au
q 2.044435637709599 8.8897e-08 au
i 5.618371495404419 3.8834e-06 deg
node 283.3687882251785 4.5198e-05 deg
peri 113.6803447019568 4.8226e-05 deg
M 347.7798530079372 1.6383e-05 deg
tp 2459044.819356100796
(2020-Jul-14.31935610)
5.9451e-05 TDB
period 1305.628173429482
3.57
7.513e-06
2.057e-08
d
yr
n .2757293441779761 1.5866e-09 deg/d
Q 2.6312365278114 1.0094e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1419  
   data-arc span      10642 days (29.14 yr)  
   first obs. used      1991-09-12  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50288  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:34:54  

Additional Information
 Earth MOID = 1.05964 au 
 Jupiter MOID = 2.75852 au 
 T_jup = 3.549 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3   n/a MPO436126  
diameter diameter 3.673 km 0.160 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.979 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.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.227   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

48981 (1998 QD45)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 QD45 = 1991 RV29 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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