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48727 (1997 AL18)
Classification: Main-belt Asteroid          SPK-ID: 2048727
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1075249286799807 3.7644e-08  
a 2.272148887510081 9.0311e-09 au
q 2.027836240430262 8.4153e-08 au
i 10.16877404554498 4.2823e-06 deg
node 111.2611722265809 2.4293e-05 deg
peri 180.3302256088395 3.2469e-05 deg
M 15.25780160000899 2.1077e-05 deg
tp 2458547.479591607723
(2019-Mar-04.97959161)
7.3213e-05 TDB
period 1250.989331333838
3.43
7.4585e-06
2.042e-08
d
yr
n .2877722383260923 1.7157e-09 deg/d
Q 2.5164615345899 1.0002e-08 au
  Orbit Determination Parameters
   # obs. used (total)      890  
   data-arc span      8353 days (22.87 yr)  
   first obs. used      1997-01-15  
   last obs. used      2019-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52351  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 03:37:15  

Additional Information
 Earth MOID = 1.01094 au 
 Jupiter MOID = 2.63926 au 
 T_jup = 3.583 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456961.5 (2014-Oct-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1074639220337093 3.7521e-08  
q 2.027938054962408 8.3814e-08 au
tp 2457297.681387183792
(2015-Oct-02.18138718)
7.3301e-05 TDB
node 111.2959988596748 2.4304e-05 deg
peri 180.6892983060241 3.2531e-05 deg
i 10.1664888833423 4.281e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      890  
   data-arc span      8353 days (22.87 yr)  
   first obs. used      1997-01-15  
   last obs. used      2019-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52351  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 03:37:15  

Additional Information
 Jupiter MOID = 2.63926 au 
 T_jup = 3.583 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.407842961777862E-15 -3.131007516561772E-15 -5.210289067642392E-13 -7.883231680889904E-15 -1.361059998944973E-13 -2.918443010191977E-15
q -3.131007516561772E-15 7.024833414581537E-15 1.163197762705157E-12 1.749355696522011E-14 2.97417484232254E-13 6.690131210622131E-15
tp -5.210289067642392E-13 1.163197762705157E-12 5.373013957094802E-9 2.400805380778731E-11 1.599869932242397E-9 9.677589392182772E-13
node -7.883231680889904E-15 1.749355696522011E-14 2.400805380778731E-11 5.906685796916821E-10 -5.739030233748274E-10 -2.202209081170736E-11
peri -1.361059998944973E-13 2.97417484232254E-13 1.599869932242397E-9 -5.739030233748274E-10 1.058269647018755E-9 2.188820495912636E-11
i -2.918443010191977E-15 6.690131210622131E-15 9.677589392182772E-13 -2.202209081170736E-11 2.188820495912636E-11 1.832731920334684E-11

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 15.7   n/a MPO337647  
rotation period rot_per 3.228 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.]

48727 (1997 AL18)          Discovered 1997-Jan-15 by Klet at Klet
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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