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).
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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).
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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
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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 |
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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 |
