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Showing posts with label Find_Orb. Show all posts
Showing posts with label Find_Orb. Show all posts

Aug 6, 2018

The Asteroid 2018 KE3 [NEO(Amor)] on 2018-08-04

The Asteroid 2018 KE3 is an Amor (a Near-Earth asteroids whose orbits approach but does NOT cross Earth's orbit) with an estimated diameter of  400 M to 900 M(1312.34 Foot to 2952.76 Foot)  its MOID (Minimum orbit intersection distance) is 0.213016 AU(82.9 Lunar Distance (LD))

On 2018-08-04 I was able to obtain 40-60 Second Luminance BIN2 Images on itelescope.net's (T17 TEL 0.43-m f/6.8 reflector + CCD).

The Asteroid 2018 KE3 [NEO(Amor)]
on 2018-08-04 from Siding Spring Observatory,
Coonabarabran, NSW,  Australia. (MPC Q62)
 a stack of 40-60 second  luminance BIN2
images taken with iTelescope.net's (T17 TEL 0.43-m f/6.8 reflector + CCD)
[tracking  on stars]
By Steven M. Tilley
The Asteroid 2018 KE3 [NEO(Amor)]
on 2018-08-04 from Siding Spring Observatory,
Coonabarabran, NSW,  Australia. (MPC Q62)
 a stack of 40-60 second  luminance BIN2
images taken with iTelescope.net's
(T17 TEL 0.43-m f/6.8 reflector + CCD)
[tracking  on stars]
By Steven M. Tilley
The Asteroid 2018 KE3 [NEO(Amor)]
on 2018-08-04 from Siding Spring Observatory,
Coonabarabran, NSW,  Australia. (MPC Q62)
 a stack of 40-60 second  luminance BIN2
images taken with  iTelescope.net's
 (T17 TEL 0.43-m f/6.8 reflector + CCD)
 [tracking  on asteroid]
By Steven M. Tilley

Asteroid Orbit diagram
for 2018 KE3 [NEO(Amor)]
courtesy of NASA/JPL-Caltech
https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2018KE3

I use Astrometrica to do the data reduction by way of the stack and track method. I had Astrometrica stack 4 sets(stacks) of ten images. Each image was shifted match movement of 2018 KE3.
The Asteroid  2018 KE3 [NEO(Amor)]
on 2018-08-04 from Siding Spring Observatory,
Coonabarabran, NSW,   Australia. (MPC Q62)
a stack of 10-60 second luminance BIN2
images taken with iTelescope.net's (T17 TEL 0.43-m f/6.8 reflector + CCD)
[tracking  on asteroid]
By Steven M. Tilley

The Asteroid  2018 KE3 [NEO(Amor)]
on 2018-08-04 from Siding Spring Observatory,
Coonabarabran, NSW,   Australia. (MPC Q62)
a stack of 10-60 second luminance BIN2
images taken with iTelescope.net's (T17 TEL 0.43-m f/6.8 reflector + CCD)
[tracking  on asteroid]
By Steven M. Tilley
The Asteroid  2018 KE3 [NEO(Amor)]
on 2018-08-04 from Siding Spring Observatory,
Coonabarabran, NSW,   Australia. (MPC Q62)
a stack of 10-60 second luminance BIN2
images taken with iTelescope.net's (T17 TEL 0.43-m f/6.8 reflector + CCD)
[tracking  on asteroid]
By Steven M. Tilley
The Asteroid  2018 KE3 [NEO(Amor)]
on 2018-08-04 from Siding Spring Observatory,
Coonabarabran, NSW,   Australia. (MPC Q62)
a stack of 10-60 second luminance BIN2
images taken with iTelescope.net's (T17 TEL 0.43-m f/6.8 reflector + CCD)
[tracking  on asteroid]
By Steven M. Tilley
I submitted four observations of  2018 KE3 to the The Minor Planet Center(MPC) in  the "new" "Astrometry Data Exchange Standard (ADES)"  format [PSV -"Pipe Separated Values"]

On 2018-08-05 the MPC published "MPEC 2018-P10 : DAILY ORBIT UPDATE (2018 AUG. 5 UT)"  containing my 2018-08-04 observations. of  2018 KE3.

As more observations are made(over time) of  any given asteroid.---more accurate orbital elements can be computed (with lower uncertainties).  Here a test with  Find_Orb showing "small" improvement to the orbital elements for 2018 KE3 (before and after my 2018-08-04 2018-08-04 observations).

Find_Orb orbital elements for 2018 KE3 before my 2018-08-04 observations.
    Perihelion 2018 Aug 16.166920 +/- 0.000226 TT =  4:00:21 (JD 2458346.666920)
Epoch 2018 Mar 23.0 TT = JDT 2458200.5   Earth MOID: 0.2133   Find_Orb

M 323.12920834 +/- 0.0012           (J2000 ecliptic)
n   0.25225127241 +/- 8.32e-6       Peri.    3.43615306 +/- 0.00026
a   2.48073556073 +/- 5.45e-5       Node   321.10306305 +/- 0.00008
e   0.5058787539 +/- 9.59e-6        Incl.   10.22121421 +/- 0.00009
P   3.91                   H 19.2   G  0.15   U  4.9  
q 1.22578414642 +/- 3.25e-6    Q 3.73568697504 +/- 0.000106
From 83 observations 2018 May 25-Aug. 3; mean residual 0".26
Find_Orb orbital elements for 2018 KE3 after my 2018-08-04 observations.
   Perihelion 2018 Aug 16.167005 +/- 0.00021 TT =  4:00:29 (JD 2458346.667005)
Epoch 2018 Mar 23.0 TT = JDT 2458200.5   Earth MOID: 0.2133   Find_Orb
M 323.12863383 +/- 0.0011           (J2000 ecliptic)
n   0.25225505676 +/- 7.77e-6       Peri.    3.43628389 +/- 0.00023
a   2.48071074989 +/- 5.09e-5       Node   321.10299979 +/- 0.00007
e   0.5058744699 +/- 8.96e-6        Incl.   10.22118040 +/- 0.00009
P   3.91                   H 19.2   G  0.15   U  4.8
q 1.22578251419 +/- 3.02e-6    Q 3.73563898558 +/- 9.89e-5
From 87 observations 2018 May 25-Aug. 4; mean residual 0".26
If one would  to keep their eye JPL Small-Body Databas day afer day they see this 
"improvement" of  orbital elements and  lower uncertainties as well.


Screenshot of  JPL's Orbital Elements for 2018 KE3 before my 2018-08-04 observations. 
 Courtesy of NASA/JPL-Caltech https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2018KE3
Screenshot of  JPL's Orbital Elements for 2018 KE3 after my 2018-08-04 observations. 
Courtesy of NASA/JPL-Caltech https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2018KE3