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Observing >> Variable Star Observing and Radio Astronomy

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nytecam
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Reged: 08/20/05
Posts: 5996
Loc: London UK
Mira [omi Ceti] on rise
      #3388833 - 10/14/09 10:13 AM Attachment (21 downloads)

Currently ~Mv 6.5 [AAVSO] and rising here's my unfiltered CCD shot of field on Oct 11 that shows it grossly brighter - inset 1s exp that shows the defocusing effect of NIR radiation via camera lens

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Nytecam 51N 0.1W
Meade 30cm LX200+ETX-70+e-finder+C8+Ha+CaK PSTs SBIG SGS+homebuilt spectrographs
Starlight SXVF_M9+Lodestar CCDs/Canon 300D DSLR/Hitachi HD+Disgo Video Fun cams
My observatory build-ETX-70 imaging-my videos




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nytecam
Postmaster


Reged: 08/20/05
Posts: 5996
Loc: London UK
Re: Mira [omi Ceti] on rise new [Re: nytecam]
      #3423998 - 11/01/09 03:49 PM Attachment (33 downloads)

here's the spectrum of variable omi Cet [Mira] extending into near-IR and for comparison three other autumn M-type bright stars in alpha Cet, beta Peg, beta And with alpha PsA [A-type] very low in my skies - hence strong A/a/B Telliric bands as marked

--------------------
Nytecam 51N 0.1W
Meade 30cm LX200+ETX-70+e-finder+C8+Ha+CaK PSTs SBIG SGS+homebuilt spectrographs
Starlight SXVF_M9+Lodestar CCDs/Canon 300D DSLR/Hitachi HD+Disgo Video Fun cams
My observatory build-ETX-70 imaging-my videos




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brianb11213
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Reged: 02/25/09
Posts: 3304
Loc: 55.215N 6.554W
Re: Mira [omi Ceti] on rise new [Re: nytecam]
      #3424955 - 11/02/09 03:45 AM

Very interesting!

My last 3 visual obs of Mira have been 6.0 (Oct 16th), 5.0 (Oct 23rd) and 4.0 (Oct 30th) - and still a fortnight to the predicted date of maximum.


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nytecam
Postmaster


Reged: 08/20/05
Posts: 5996
Loc: London UK
Re: Mira [omi Ceti] on rise new [Re: brianb11213]
      #3462575 - 11/22/09 05:41 PM

Through my IR night-sight last night I rated Mira=alpha Ceti [Mv2.5] - both stars of similar colour index

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Nytecam 51N 0.1W
Meade 30cm LX200+ETX-70+e-finder+C8+Ha+CaK PSTs SBIG SGS+homebuilt spectrographs
Starlight SXVF_M9+Lodestar CCDs/Canon 300D DSLR/Hitachi HD+Disgo Video Fun cams
My observatory build-ETX-70 imaging-my videos




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brianb11213
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Reged: 02/25/09
Posts: 3304
Loc: 55.215N 6.554W
Re: Mira [omi Ceti] on rise new [Re: nytecam]
      #3462683 - 11/22/09 06:46 PM

Hmm .... I reckon Mira has "plateaued" about equal to gamma Ceti (3.56 on the BAA VSS charts).

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