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There is lots of useful technical information in the VO Service Guide here:
https://virginorbit.com/wp-content/uploads/2020/09/LauncherOne-Service-Guide-August-2020.pdf
On page 22 there is a launch profile diagram showing altitude (in 1000 ft) vs time. We also have the visibility maps here:
https://virginorbit.com/the-latest/where-can-i-spot-the-launcherone-rocket-on-launch-day/
I am assuming these mean that the vehicle is above the horizon from a particular location so they are very optimistic in terms of visibility. For example at 300s after drop the second stage will be burning and the altitude will be around 500,000 ft or 150km. At 300s according to the launch track it will be around 1000km great circle distance from Salisbury (off the northwest coast of Spain) so a bit of trigonometry gives a height above your horizon of 4 degrees I think.
You might want to check that maths. It is a bit early in the morning…
I still don’t have mine in Chelmsford but the mail is pretty terrible at the moment and I’ll give it another couple of weeks before I request a replacement.
Ta David. I’ll keep this one on file. Good to see the quality press providing a worthy entry in a category normally dominated by the tabloids. No giraffe-based dimensions though.
Here’s a grotty image of the field from last night (Dec 15). It was quite hazy and my sky is very bright at the moment due to the blanket of now on the ground.
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Aladin shows a faint galaxy at this position and the NASA/IPAC database lists two sources associated with it. The WISE source that Paul identified and a GALEXASC source (GALEXASC J062056.21+781041.4). Do you know when the background image in your message was taken?
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Jack, thanks for the pictures and David, thanks for the details. There are a few “Astronomer” pubs around the country. I wonder how many have rooms like this?
Yes, very enjoyable and great to see so many people at the meeting. Does anyone have any info on that Wray refractor at the pub?
Composites should always be marked as such so that it is clear that parts of the image have been processed separately and then recombined. People can then make a judgement about how “real” the image is. I wouldn’t say that a composite is a “fake” since, if done properly, it shows what would have been seen if the limitations of the telescope and camera had not been present. A good example is stacking a moving object, such as a comet, separately from the fixed stars. I agree though that this is open to abuse from people who are less than honest about how the image has been generated.
And 3rd and 4th contact were 05:59:02 and 05:59:31 although the seeing by then was even worse.
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I got a good (electronic) view here in Chelmsford too. I’ve uploaded a full frame image of the Moon and Mars and a frame from the video:
https://nickdjames.com/20221208_Mars_occultation/moon_20221208_0456_ndj.jpg
https://britastro.org/observations/observation.php?id=20221208_051712_492f9d9303a0d800From my video I get first contact at 04:59:56 and 2nd at 05:00:29. The seeing was pretty poor though. Temperature at the moment is -2.8C.
Here we go again. Another attempt to launch SLS and Artemis-1. The launch window opens at 0604 UTC tomorrow (November 16) and if it goes at the start of the window we may get to see it on the first morning although the sky will probably be too light. After that, things are not so good. You can get an ephemeris from JPL Horizons if you want to have a go at observing it on the way to the Moon. There is an opportunity over the next few mornings as the spacecraft moves through Virgo, Libra and Scorpius.
That is really sad news. I met Bob at the TA AGM in 2006 September. At that meeting we had Tom Boles, Mark Armstrong, Maurice Gavin and Ron Arbour, all of whom had discovered supernovae using imaging. By that time Bob had discovered around 40 supernovae, all visually. Bob’s talk was excellent and should be around on video somewhere. I do remember him passing on greetings to those of us who lived “in the northern polar regions”. I don’t think he fancied observing from here!
Fascinating.
Following Alex’s link gets to a rather complicated map but, if I understand it correctly, the whole event is only visible during totality from Indochina. I’ve just checked using Stellarium and, indeed, they have a good view of this from Hanoi. The next time this happens is 2235 so I guess we are quite lucky!
I wonder if we will see any pictures of it.
Nick.
You don’t need to wait for a fast moving NEO to pass by. I regularly check my timing accuracy by doing astrometry of GPS satellites as explained by Bill Gray here:
I’ve put a speeded up version of my eclipse video here:
https://www.nickdjames.com/Eclipses/20221025/eclipse_20221025_ndj.mp4
The entire eclipse in 35 seconds.
Someone on Youtube yesterday said that watching a partial eclipse was like watching paint dry. As a public service this video is short enough that it should not stress the attention span of most social media users.
Clear here at the moment and the livestream is running. Under 30 mins to go.
https://www.youtube.com/watch?v=1nUMDx8PiF4
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My livestream on Tuesday morning will be here:
The forecast for Tuesday here is light cloud all morning so it may not be a very interesting livestream! At least it is not likely to be raining…
Much better conditions tonight but the spacecraft is now around mag 19.
https://britastro.org/observations/observation.php?id=20221018_013758_7e01f580c6581403A few tiny gaps between the rain clouds in Chelmsford. The fact that it is very close to the Moon doesn’t help but it is around 16.5 at the moment on the one out-of-focus image that I’ve managed to get.
Here’s the badly out of focus image:
https://britastro.org/observations/observation.php?id=20221017_033930_ce425b3fe9fb12a2
