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28P/Neujmin 1
Classification: Jupiter-family Comet          SPK-ID: 1000063
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2455831.5 (2011-Sep-27.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7740745009334175 6.1505e-08  
a 6.922572239764651 9.4712e-08 au
q 1.563985588093299 4.3754e-07 au
i 14.37789639898481 1.1562e-05 deg
node 346.3160970317399 8.7276e-05 deg
peri 347.7386530822694 8.6573e-05 deg
M 172.8836510574976 1.1736e-05 deg
tp 2452636.645410571499
(2002-Dec-28.14541057)
0.00018127 TDB
period 6652.726531161382
18.21
0.00013653
3.738e-07
d
yr
n .05411315170009761 1.1105e-09 deg/d
Q 12.28115889143601 1.6803e-07 au
  Orbit Determination Parameters
   # obs. used (total)      549  
   data-arc span      19847 days (54.34 yr)  
   first obs. used      1966-05-16  
   last obs. used      2020-09-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42789  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2020-Sep-28 09:07:43  

Additional Information
 Earth MOID = .557212 au 
 Jupiter MOID = .960522 au 
 T_jup = 2.166 
[ 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
comet total magnitude M1 13.2   0.5 45 2 parameter fit from 372 observations, autocmod 2.9a
comet total magnitude slope K1 4.5   n/a 45 autocmod 2.9a
diameter diameter 21.4 km n/a Lamy,P.L,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (To be published)  
geometric albedo albedo 0.025   0.008 Earth, Moon, and Planets, v. 89, Issue 1, p. 117-134 (2002)  

28P/Neujmin 1          Discovered 1913-Sep-04 by Neujmin, G. N. at Simeis, Crimea
discovered on plate/photo taken on discovery date
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1984.8       1984 XIX   1984c 
 1966.6       1966 VI   1966a 
 1948.3       1948 XIII   1948f 
 1930.1   28P/1931 S1   1931 I   1931d 
 1911.9   28P/1913 R2   1913 III   1913c 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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