Neil Norman

A fuzzy white dot on a blue background, with surrounding contour lines

3I/ATLAS measurement from HST is in: can see the coma but not the nucleus. Sets effective nuclear radius of r < 2.8 km (H>15.4), significantly smaller than earlier estimates (as anticipated).
Jewitt et al, (submitted?) arxiv.org/abs/2508.02934 🔭☄️

Hi Maik.
Is there a list of the brightest comet absolute magnitudes, please?

Hi Maik. Is there a list of comets with the brightest absolute magnitude's please?

3I/Atlas: Mystery interstellar object could be the oldest known comet Scientists have been racing to discover the origins of 3I/Atlas since it was spotted last week.

A mystery interstellar object spotted last week by astronomers could be the oldest comet ever seen, according to scientists. Named 3I/Atlas, it may be three billion years older than our own solar system, suggests the team from Oxford university. #Astronomy #Space www.bbc.co.uk/news/article...

Image of the orbital situation of comet C/1801 N1 (Pons) at the date of discovery, https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=C%2F1801%20N1&view=VOP

#bskycometography no. 236

C/1801 N1 (Pons)

1801 Jul 11: Disc by J. L. Pons (France) at 6.5 mag. First comet of the 19th century for which was offered a prize of 600 Francs. 3 indep disc's one day later! Perigee Jul 12 at 0.38 au, perihelion Aug 9 at 0.26 au. Last seen on Jul 23.
☄️🔭 #CometWatch

What do you think it is, David? Comet or asteroid?

What Caused ʻOumuamua's Mysterious Non-Gravitational Acceleration? - We may finally have the answer Scientists may have found an explanation for one of the biggest mysteries about ʻOumuamua that baffled astronomers in 2017.&nbsp;

What Caused ʻOumuamua's Mysterious Non-Gravitational Acceleration?

We may finally have the answer: www.universal-sci.com/article/caus...

What can we expect from this comet, Maik?
From a northern hemisphere perspective that is.

Thank you, Maik.
I know if anyone can find an eventual link, it is you.

Thank you, Maik. Which uncertain candidates do you know of?

Hi Maik.
Is there any chance this one can be tracked back in time,do you think?

@comethunter.de Hi Maik. Is there any chance comet C/1110 K1 could be related to C/1861 J1?

Image of C/1927 E1 (Stearns) by G. van Biesbroeck on 1927 March 13, https://articles.adsabs.harvard.edu/full/1927PA.....35..227V, https://commons.wikimedia.org/w/index.php?curid=145728783

#bskycometography no. 114

C/1927 E1 (Stearns)

1927 Mar 10: Discovery by C. L. Stearns (USA) at 10 mag shortly prior perihelion (Mar 22, at 3.68 au). The comet became as bright as 9 mag and was followed for a few years until 1931 Mar 12. Large object with H10 = 1.9 mag.
☄️🔭 #CometWatch