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349P/Lemmon
Classification: Encke-type Comet          SPK-ID: 1003494
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457280.5 (2015-Sep-15.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .300511259198777 1.5437e-06  
a 3.568116015942055 9.787e-07 au
q 2.495856979023984 4.8574e-06 au
i 5.498796979791869 7.9571e-05 deg
node 331.8155945540785 0.00045067 deg
peri 256.2606882242893 0.0010754 deg
M 255.7554662087082 0.000679 deg
tp 2457993.365616176798
(2017-Aug-27.86561618)
0.0043602 TDB
period 2461.823296533227
6.74
0.0010129
2.773e-06
d
yr
n .1462330787538476 6.0165e-08 deg/d
Q 4.640375052860125 1.2728e-06 au
  Orbit Determination Parameters
   # obs. used (total)      123  
   data-arc span      3069 days (8.40 yr)  
   first obs. used      2010-03-14  
   last obs. used      2018-08-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .52486  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 11:12:53  

Additional Information
 Earth MOID = 1.49229 au 
 Jupiter MOID = .631768 au 
 T_jup = 3.031 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.7   n/a MPO176524  
comet total magnitude M1 7.5   0.6 11 from 75 observations, assumed slope, autocmod 2.8
comet total magnitude slope K1 24.5   n/a 11 autocmod 2.8
comet nuclear magnitude M2 15.7   0.6 11 from 24 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 11 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 11 autocmod 2.8
diameter diameter 2.983 km 0.404 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.104   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2017.7   349P/2017 B1       
 2010.9   349P/2010 EY90       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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