Old 08-02-2020, 01:09 PM
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eta carinae spectrum

Spectrum, taken Jan 5th from Mt Waverley, by way of SA100 (grism) and C11.

For comparison, I attached the one taken in 2016, with same camera (scope was different (MTO 10_1100) and grism was closer to sensor)
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Click for full-size image (eta_Car_20_07_2016.jpg)
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Last edited by bojan; 08-02-2020 at 05:11 PM.
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Old 16-02-2020, 07:16 PM
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JimsShed (Jim)
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Hi Bojan,
Interesting changes in values. Can you suggest any reading matter that would help in understanding or interpreting these values.

Thanks, Jim
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Old 16-02-2020, 08:18 PM
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It appears to me that the brightness of Eta has increased a little since last year. As a northerner, I arrived in Oz last Friday night and I pointed my binos to the star tonight and it was considerably brighter than the three surrounding stars forming a triangle s, p and u Carinae. Last time I saw it (Mar 2019) it appeared fainter.

Is that really true ?
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Old 17-02-2020, 04:36 AM
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Wikipedia has a lot of details:
As to differences in spectra, resolution and scale are too different to directly compare them. Also, IR part is very dependent on local (atmospheric) conditions..
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Old 05-03-2020, 07:20 AM
Domino (Maurice)
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Thanks for sharing those pics. An interesting comparison.
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