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Steve KnightParticipantI think that is Venus. Rotated image so north is at top and tried matching objects. Alas Mercury seems to be behind our planet.
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Steve KnightParticipantIncredible image by Reid Wiseman of moonlit Earth after TLI burn. South at top (of course). Aurora and Zodiacal light visible. Is that Venus bottom right?
Steve KnightParticipantCopy that Nick! Situation now nominalish, duhh, I was looking at rise time of RA and Dec when burn started and finished. Can you pull out of the Ephemeris when Artemis in Earths shadow?
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This reply was modified 2 weeks, 4 days ago by
Steve Knight.
Steve KnightParticipantHelp required. When I use Horizons to generate RA and Dec for the 23.43 UT TLI burn RA and Dec are 49 degrees below horizon with it rising 10 hours later. I am obviously doing something stupid. I just don’t know what!
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Steve KnightParticipantI echo Pauline’s comments about Allan’s amazing talks at the Newbury Astronomical Society’s Christmas Dinners. I often drove him and Rachel back to their home in Oxford afterwards. A second lecture on the A34 was a second highlight for me. RIP Allan.
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Steve KnightParticipantAre occasional mobile smart telescope users allowed to participate? 152 nights (41.6%), best month May (24), worst February (4).
Steve KnightParticipantOwen, journal is now on the website. Paper copies including the 2026 handbook are on the way. PDF of handbook can now be downloaded from website.
Steve KnightParticipant…and there is more….
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Steve KnightParticipantHere’s the piece in The Times.
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Steve KnightParticipantI think I may have captured fragments A & C with my humble Seestar. Here’s a comparison with Nick’s image taken about 35 hours earlier. Image scale is the same. The orientation of the tail is consistent with its motion. Thoughts or an artifact?
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This reply was modified 4 months, 3 weeks ago by
Steve Knight.
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Steve KnightParticipantAccording to my university notes angular seperation of red & blue images from atmospheric chromatic abberation is:
¬4 x 10^-6 x tan angle from zenith. Angles are in radians.
Based on a 450nm refractive index of 1.0002796 and a 650nm refractive index of 1.0002758.
Steve KnightParticipantIn case anyone has missed this far out non peer reviewed speculation.
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Steve KnightParticipantThink it was Space X’s Transporter-14, Mel Gigg captured a nice video of it. Alas I was in bed. https://www.youtube.com/watch?v=RDe-gmF1dxM
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This reply was modified 10 months ago by
Steve Knight.
17 June 2025 at 10:31 am in reply to: Asteroid 2024 YR4 – Close approach in 2032 – Risk of Earth impact #630288
Steve KnightParticipantInteresting!
Looks like a 4% chance of a visit to Australia on Dec 22nd 2032. The view of the Earth from the Moon at possible impact time.
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Steve KnightParticipantVery interesting to read Paul’s report in the latest Journal. It reminded me of the cover of a Patrick Moore SF book that I took out of the library when I was an excitable 10 year old. The illustration is by David Hardy.
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Steve KnightParticipantUp at 2.30am, clear, drove 4 miles to get a low NE horizon, my Seestar’s view at 3.30am. A little frustrating!
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Steve KnightParticipantGood news. C/2025 F2 (SWAN) is now in Seestar catalog. No Seestar star hopping for me tomorrow morning.
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This reply was modified 1 year ago by
Steve Knight.
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Steve KnightParticipantGlad it now has a name.
4 am alarm failed to wake me this morning so was late going on duty. Brightening sky rapidly halted play. 14 min 50 sec of 10 sec subs with Seestar S50. Tail was much less visible than yeaterday but yesterday alarm woke me and managed nearly 25 minutes.
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Steve KnightParticipantSome good news from publicity. ZWO have added it to Seestar’s catalog.
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Steve KnightParticipantI to would be very interested in such a script. Have been using a Seestar to keep on eye on T CrB since June whenever circumstances allow. As of this morning I have 25,094 images of T CrB not in outburst. I am now using an S30 instead of an S50 which I think gives better results. Fewer rejected frames due to shorter focal length and smaller aperture means the sensor would saturate later when it goes into its long awaited outburst.
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