Observation by Paul Whitmarsh: Interstellar object I3/ATLAS' path ...

Uploaded by

Paul Whitmarsh

Observer

Paul Whitmarsh

Observed

2025 Dec 14 - 03:41

Uploaded

2025 Dec 15 - 00:52

Objects

C/2025 N1

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Constellation

Leo

Field centre

RA: 11^h08^m
Dec: +05°04'
Position angle: -0°25'

Field size

0°38' × 1°12'

Equipment

Seestar S50

Exposure

20" exposures from 01:05:42UT to 06:30:16UT

Location

Mileaway Observatory Uckfield

Target name

I3/ATLAS aka C/2025 N1 (ATLAS)

Title

Interstellar object I3/ATLAS' path through Leo

About this image

The interstellar object I3 ATLAS traveling through Leo, the image is centred on star is HD 96795. The object was predicted to be around mag 16, five days before closest approach to Earth on the 19th Dec, at some 1.8AU distance. Where 1AU is the distance between Earth and the Sun.

This is a 5 and a half hour image, with the stars stationary while the Interstellar object glides through the field of view creating a trail, showing the path it has taken.

Taken with a SeeStar S50 using Luminance filter.

Stacked in Siril, processed in Pixinsight.

Files associated with this observation

HD_96795_I3 ATLAS_C2025 N1 ATLAS_714x20sec_T12C_2025-12-13_01h05m42s to 06h30m16s.png (2.1 MB)

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