ICEINSPACE
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Last Quarter 47.7%
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27-04-2020, 08:47 PM
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Bright the hawk's flight
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Join Date: Nov 2008
Location: Mt Duneed Vic
Posts: 3,982
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Getting hammered by satellites!!
Doing an imaging run on the Leo Triplet at the moment. My subs are getting hammered by satellites, most trails in one 5 minute sub was 5 and 50% of all subs are getting something.All travelling in one direction, west to east as far as I can tell. I can probably count on one hand the number of subs I have lost from trails in the last 12 months.
Anyone else having similar issues??
Malcolm
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27-04-2020, 08:56 PM
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Registered User
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Join Date: Jun 2013
Location: Lake Macquarie
Posts: 7,096
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Starlink just launched another 60.
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27-04-2020, 09:04 PM
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ze frogginator
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Join Date: Oct 2007
Location: Sydney
Posts: 22,068
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Quote:
Originally Posted by glend
Starlink just launched another 60.
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Looks like the black paint has come off.
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27-04-2020, 09:24 PM
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Registered User
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Join Date: Feb 2011
Location: Kilmore, Australia
Posts: 3,348
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I had the same thing recently but worked out that where I was imaging covered the typical orbits of geostationary sats, I hardly got a streak free sub all night.
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27-04-2020, 09:38 PM
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Bright the hawk's flight
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Join Date: Nov 2008
Location: Mt Duneed Vic
Posts: 3,982
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Quote:
Originally Posted by The_bluester
I had the same thing recently but worked out that where I was imaging covered the typical orbits of geostationary sats, I hardly got a streak free sub all night.
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I thought of that but assumedgeostationary ones would be very close to equator? My target is at declination 13 degrees N.
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28-04-2020, 01:05 AM
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Registered User
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Join Date: Mar 2012
Location: Narangba, SE QLD
Posts: 1,551
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Aren't Geo-stationary satellites locked in position over the continent its covering, like the Foxtel satellite?
So you shouldn't see them move, I had an idea of using the Foxtel Sat as an artificial star for scope testing, but never got around to it.
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28-04-2020, 07:23 AM
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Registered User
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Join Date: Feb 2011
Location: Kilmore, Australia
Posts: 3,348
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Geostationary sats sit more or less still in alt-az, so they drift through images at the RA rate.
I say more or less still as some of them have somewhat inclined orbits so they wander back and forward in Dec over an orbit.
Last edited by The_bluester; 28-04-2020 at 07:37 AM.
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28-04-2020, 08:48 AM
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Bright the hawk's flight
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Join Date: Nov 2008
Location: Mt Duneed Vic
Posts: 3,982
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Quote:
Originally Posted by billdan
Aren't Geo-stationary satellites locked in position over the continent its covering, like the Foxtel satellite?
So you shouldn't see them move, I had an idea of using the Foxtel Sat as an artificial star for scope testing, but never got around to it.
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Yes, but they move against the background sky so you still get streaks.
Malcolm
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28-04-2020, 09:09 AM
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Registered User
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Join Date: Mar 2012
Location: Narangba, SE QLD
Posts: 1,551
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Thanks Paul and Malcolm, I'm "Thick as a Brick" sometimes.
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28-04-2020, 09:10 AM
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Oh, I See You Are Empty!
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Join Date: Apr 2010
Location: Laramie, WY - United States of America
Posts: 1,550
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This got me thinking... is there any software that can list the number of satellites expected in a FoV (& which ones) during an imaging session?
I use kstars/ekos, but can't find anything that does predictive modelling for satellites intersecting a target (field).
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28-04-2020, 09:12 AM
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PI cult member
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Join Date: Dec 2012
Location: Flaxton, Qld
Posts: 2,066
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Take enough subs and use good dithering it shouldn't be much of an issue?
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28-04-2020, 09:13 AM
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ze frogginator
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Join Date: Oct 2007
Location: Sydney
Posts: 22,068
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Quote:
Originally Posted by OICURMT
This got me thinking... is there any software that can list the number of satellites expected in a FoV (& which ones) during an imaging session?
I use kstars/ekos, but can't find anything that does predictive modelling for satellites intersecting a target (field).
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There's a market for a plugin to shut the camera shutter momentarily when there's a "constellation" flyby.
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28-04-2020, 10:06 AM
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Bright the hawk's flight
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Join Date: Nov 2008
Location: Mt Duneed Vic
Posts: 3,982
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Quote:
Originally Posted by The_bluester
Geostationary sats sit more or less still in alt-az, so they drift through images at the RA rate.
I say more or less still as some of them have somewhat inclined orbits so they wander back and forward in Dec over an orbit.
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Which is exactly what I am getting. I am even seeing a couple that appear in 2 images, with the streak cutting off near the middle of the frame a starting near that point in the next frame.
I am guessing that as geostationary satellites orbit at about 35,800km above sea level above the equator, then at 38deg South, we would see them north of the celestial equator?
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28-04-2020, 10:08 AM
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Bright the hawk's flight
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Join Date: Nov 2008
Location: Mt Duneed Vic
Posts: 3,982
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Quote:
Originally Posted by lazjen
Take enough subs and use good dithering it shouldn't be much of an issue?
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Yeah, I increased my dither as some of the streaks were several pixels wide so needed to make sure they disappear in processing. Will find out later today how successful I was!!
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28-04-2020, 10:39 AM
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Registered User
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Join Date: Feb 2011
Location: Kilmore, Australia
Posts: 3,348
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It was around M61 in my case and just having a look back at some data, the satellites show up at about +5 Dec for me. I had a look in Stellarium and the Leo triplet looks to get absolutely hammered by satellites, it must be on the edge of the inclination where they park the geostationary ones.
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29-04-2020, 12:14 AM
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Bright the hawk's flight
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Join Date: Nov 2008
Location: Mt Duneed Vic
Posts: 3,982
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Quote:
Originally Posted by The_bluester
It was around M61 in my case and just having a look back at some data, the satellites show up at about +5 Dec for me. I had a look in Stellarium and the Leo triplet looks to get absolutely hammered by satellites, it must be on the edge of the inclination where they park the geostationary ones.
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Yep, the Triplet was just awful, went and got a few subs on M61 and it had a few as well. Turned out it may be a wasted effort in the end. The Triplet data looked OK, but when I had processed, it had a massive gradient from the lights of Geelong (I now live on southern edge of Geelong) I thought I would be able to process the gradient out but ended up with horrible artifacts all over the masters. 6 hours of exposures and nothing to show!! The good news was that Pixinsight had no issues getting rid of the satellite trails!
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29-04-2020, 02:03 AM
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Oh, I See You Are Empty!
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Join Date: Apr 2010
Location: Laramie, WY - United States of America
Posts: 1,550
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Quote:
Originally Posted by OICURMT
This got me thinking... is there any software that can list the number of satellites expected in a FoV (& which ones) during an imaging session?
I use kstars/ekos, but can't find anything that does predictive modelling for satellites intersecting a target (field).
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Quote:
Originally Posted by multiweb
There's a market for a plugin to shut the camera shutter momentarily when there's a "constellation" flyby.
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Hmmm... if I only had the time (and skills)...
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29-04-2020, 04:04 PM
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Settled
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Join Date: Sep 2008
Location: Auckland, NZ
Posts: 343
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Isn’t there someone with a petition to stop Musk polluting space with more of this junk? I’m really starting to hate his ideas. Not enough that we have to put up with LED lights as bright as day. Now we have to deal with this satellite orgy as well. Not even dark skies are a remedy here anymore. Isn’t there something like a basic human right to undisturbed night skies? This day and age really has a right to all sorts of minority driven cultural sensitivities but apparently space is on no ones agenda.
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29-04-2020, 08:25 PM
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Registered User
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Join Date: Feb 2011
Location: Kilmore, Australia
Posts: 3,348
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Yeah, there is, at least one, probably many. I would expect them to be as effective as any other internet petition. The only thing that will save us from thousands of Starlink sats would be bankruptcy of SpaceX, and even then someone else would probably swoop in, buy the lot for a song and keep going.
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30-04-2020, 11:49 AM
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Registered User
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Join Date: Mar 2012
Location: Narangba, SE QLD
Posts: 1,551
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ONEWEB (British) launched 74 satellites in Feb/Mar 2020 (was planned to be a total of 650) and then immediately filed for bankruptcy in late March due to Covid-19.
https://en.wikipedia.org/wiki/OneWeb..._constellation
Last edited by billdan; 30-04-2020 at 11:59 AM.
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