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Old 23-09-2024, 11:08 PM
Rob_K
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Join Date: Oct 2006
Location: Bright, Vic, Australia
Posts: 2,187
C/2023 A3 (Tsuchinshan-ATLAS) spectrum

Here's a rough spectrum I took of this comet this morning. It is showing dominance of continuum (sunlight reflection off dust) with little or no sign of gaseous C2 emissions, i.e. a VERY dusty comet. It also has a sodium emission (marked) which should increase in strength as the comet approaches perihelion. I couldn't graph it as my software (RSpec) won't open on my new laptop. Have to sort that out!

The comet is still a reasonably difficult get in morning skies and with a bright Moon. But it's coming along nicely!

Cheers -
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Click for full-size image (C2023 A3 spectrum, 22 Sept 2024, 18-59 UT st13x20sec full-res lge crop text small.jpg)
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