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3807 Pagels (1981 SE1)
Classification: Main-belt Asteroid          SPK-ID: 2003807
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1677253111710565 3.0345e-08  
a 2.253703806185663 6.3751e-09 au
q 1.875700634005778 6.783e-08 au
i 4.298255713162435 3.7479e-06 deg
node 160.9222949106279 4.1087e-05 deg
peri 129.3500249603197 4.2653e-05 deg
M 216.1955405271307 1.2266e-05 deg
tp 2459494.143630142058
(2021-Oct-06.64363014)
4.2618e-05 TDB
period 1235.787175881485
3.38
5.2435e-06
1.436e-08
d
yr
n .2913122963452121 1.2361e-09 deg/d
Q 2.631706978365548 7.4444e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2818  
   data-arc span      23512 days (64.37 yr)  
   first obs. used      1955-12-12  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42768  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:59:21  

Additional Information
 Earth MOID = .86313 au 
 Jupiter MOID = 2.54412 au 
 T_jup = 3.603 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456751.5 (2014-Apr-04.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1680479418487373 3.0346e-08  
q 1.874528067709259 6.7852e-08 au
tp 2457023.105636727690
(2014-Dec-31.60563673)
4.1018e-05 TDB
node 160.9551888232129 4.1074e-05 deg
peri 129.4436748772506 4.2637e-05 deg
i 4.298836416765621 3.7493e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2818  
   data-arc span      23512 days (64.37 yr)  
   first obs. used      1955-12-12  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42768  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:59:21  

Additional Information
 Jupiter MOID = 2.54412 au 
 T_jup = 3.603 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.208957412105039E-16 -2.052938462180534E-15 3.845199091998219E-13 -4.667175277057092E-15 9.912520653857143E-14 -3.670052013000028E-18
q -2.052938462180534E-15 4.603939214345975E-15 -8.632066498990733E-13 1.040695511455767E-14 -2.248816385115706E-13 8.489081879035578E-17
tp 3.845199091998219E-13 -8.632066498990733E-13 1.682470468755044E-9 -9.137772030911378E-12 4.77032198806536E-10 -1.194746923422601E-12
node -4.667175277057092E-15 1.040695511455767E-14 -9.137772030911378E-12 1.687074887232082E-9 -1.684205796332134E-9 1.102272302742276E-11
peri 9.912520653857143E-14 -2.248816385115706E-13 4.77032198806536E-10 -1.684205796332134E-9 1.817932616053817E-9 -1.132906739051268E-11
i -3.670052013000028E-18 8.489081879035578E-17 -1.194746923422601E-12 1.102272302742276E-11 -1.132906739051268E-11 1.405706476476518E-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 13.1   n/a MPO502189  
diameter diameter 5.532 km 0.183 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.3 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:
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.399   0.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3807 Pagels (1981 SE1)          Discovered 1981-Sep-26 by Skiff, B. A. and Thomas, N. G. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1981 SE1 = 1974 QM 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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