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4785 Petrov (1984 YH1)
Classification: Main-belt Asteroid          SPK-ID: 2004785
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0621917001840015 2.9145e-08  
a 2.664628347877832 1.0042e-08 au
q 2.498910580564823 7.8392e-08 au
i 2.675219810393266 4.0786e-06 deg
node 301.5045573441161 7.8212e-05 deg
peri 115.7848129923712 8.7444e-05 deg
M 72.19823316938701 3.7996e-05 deg
tp 2458681.876751178816
(2019-Jul-17.37675118)
0.0001676 TDB
period 1588.742058361927
4.35
8.9811e-06
2.459e-08
d
yr
n .2265943663448919 1.2809e-09 deg/d
Q 2.830346115190842 1.0667e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2466  
   data-arc span      15471 days (42.36 yr)  
   first obs. used      1978-07-09  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48217  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 19:54:12  

Additional Information
 Earth MOID = 1.51225 au 
 Jupiter MOID = 2.37137 au 
 T_jup = 3.380 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456535.5 (2013-Aug-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06033340184659858 2.9054e-08  
q 2.504353529367486 7.7972e-08 au
tp 2457089.060067999823
(2015-Mar-07.56006800)
0.00017387 TDB
node 301.6862890044608 7.804e-05 deg
peri 114.7398660257568 8.7937e-05 deg
i 2.678076164994617 4.0829e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2466  
   data-arc span      15471 days (42.36 yr)  
   first obs. used      1978-07-09  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48217  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 19:54:12  

Additional Information
 Jupiter MOID = 2.37137 au 
 T_jup = 3.380 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.441552387906644E-16 -2.248870348493177E-15 -6.053081340510259E-13 -4.467158300496283E-16 -1.483184789242401E-13 -2.092029271692213E-16
q -2.248870348493177E-15 6.079631795195901E-15 1.603924679423627E-12 -1.578264768417059E-16 3.864955745248401E-13 6.735383271752777E-16
tp -6.053081340510259E-13 1.603924679423627E-12 3.022946056709073E-8 -1.438919786240501E-11 7.060207149750511E-9 1.198408591473374E-12
node -4.467158300496283E-16 -1.578264768417059E-16 -1.438919786240501E-11 6.090208820351838E-9 -6.086404627741994E-9 8.284510062056268E-11
peri -1.483184789242401E-13 3.864955745248401E-13 7.060207149750511E-9 -6.086404627741994E-9 7.732846362861488E-9 -8.248060992020285E-11
i -2.092029271692213E-16 6.735383271752777E-16 1.198408591473374E-12 8.284510062056268E-11 -8.248060992020285E-11 1.667040579302033E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.5   n/a MPO358676  

4785 Petrov (1984 YH1)          Discovered 1984-Dec-17 by Karachkina, L. G. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1984 YH1 = 1978 NC1 = 1979 SE5 = 1981 AN2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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