M76 Little Dumbbell in Perseus

[Fay]

This is 10 x 300 sec using PHD as a guide programme. It is a planetary nebula similiar to M27 & although similar in size, it is 5 times more distant at 3,900 ly.

I did do RGB, but think I did not do enough frames & also I am no good at processing so have put on in monochrome.

Not sure what the star is at the bottom.


Fay

[JohnP]

Nice image Fay - it's a weird looking nebula... I see you have been playing with Astronomy Tools as well...

The details for the star underneath are as follows: (did you really want to know....)

Information about TYC 3291-1611-1
Summary
Visual magnitude: 6.66
Spectral type: K5 
Distance: 845 +/- 145 light years
Luminosity: 118 +/- 44 x Sun's luminosity

Position information for 18 Nov 2007 13:58:24
JD: 2454423.04056
Apparent RA: 01h 44m 07.96s
Apparent Dec: +51° 33' 36.3"
Constellation: Perseus
Altitude: +20° 6' 53"
Azimuth: 28° 19' 31"
Hour angle: 15h 3m 11s
Transit: 22h 53m 45s
Comments: The star is circumpolar and never rises or sets

Names and Catalog Numbers
Tycho catalog number: TYC 3291-1611-1
Hipparcos catalog number: HIP 8063
PPM catalog number: PPM 26667
SAO catalog number: SAO 22551
HD catalog number: HD 10498
BD number: BD +50 0336 

Star atlas chart numbers
Herald-Bobroff Astroatlas: Chart C-19
Millennium Star Atlas: Charts 63-64 (Vol I)
Sky Atlas 2000.0: Chart 1
Uranometria 2000: Chart 37, Vol 1

Display Hipparcos record
Display Tycho 2 Catalog record


Hipparcos Catalog Data
Hipparcos Catalogue (ESA SP-1200, 1997).
Hipparcos Identifier/Proximity Flag
Catalog number: HIP 8063
Proximity flag: None

Descriptor
V magnitude: 6.66
Source of V mag: Median Hipparcos magnitude (Hp), combined with information on the colour index (either V-I or Bt-Vt), in combination with the luminosity class.

Main Mission Astrometric Data
Equatorial coordinates (epoch J2000.0, ICRS)
Right Ascension: 01h 43m 36.2204s
Declination: +51° 30' 57.014"

Standard errors of the equatorial coordinates (epoch J1991.25)
RA: 0.00050 arcsec
Dec: 0.00054 arcsec

Parallax information
Trigonometric parallax: 0.00386 arcsec
Standard error of the parallax: 0.00080 arcsec

Proper motion components (epoch J1991.25, ICRS)
RA: -0.00448 arcsec/yr
Dec: +0.00487 arcsec/yr
Standard error in RA: 0.00084 arcsec
Standard error in Dec: 0.00063 arcsec

Miscellaneous astrometric information
Percentage of data rejected (F1): 2%
Goodness-of-fit parameter (F2): 0.62

Tycho Photometry and Colour Indices
Bt magnitude: 8.792
Standard error in Bt: 0.012
Vt magnitude: 6.847
Standard error in Vt: 0.005
Johnson B-V colour index: 1.614
Standard error: 0.010
Source of B-V value: Determined from the transformed Tycho Bt-Vt data.
Cousins' V-I colour index: 1.64
Standard error: 0.01
Source of V-I value: Method L

Main Mission Photometry
Median magnitude, Hp: 6.7686
Standard error in median magnitude: 0.0010 mag
Scatter of Hp observations: 0.009 mag
Number of Hp observations: 98

Main Mission Variability
Observed magnitude at maximum and minimum luminosities
Mag at max, Hp: 6.75 (5th percentile)
Mag at min, Hp: 6.78 (95th percentile)
Type of variability: "Constant" star or, more strictly, stars not detected as variable. These include stars used as photometric standards. The category also includes stars noted as variable in the Hipparcos input catalog. Caution must be exercised in assuming that stars in this category are non-variable; they may be variable at levels below the Hipparcos detectability threshold, or they may have shown variability in the past (eg Be stars, or long-period eclipsing binaries).

Multiplicity Data
Number of components: 1

Miscellaneous
Comment: This is a "survey" star.
HD identifier: HD 10498
DM identifier: BD +50 0336 
V-I colour index: 1.67 mag
Spectral type: K5 
Source of spectral type: SIMBAD

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Tycho 2 Catalog Data
Tycho 2 Catalogue (E.Hog et al., 2000).
Basic Information
Catalog number: TYC 3291-1611-1
Magnitude: 6.67 (Johnson V mag)
B-V colour index: +1.665 mag

Equatorial coordinates (epoch J2000.0, ICRS)
RA: 01h 43m 36.2199s
Dec: +51° 30' 57.022"

Proper motion components (epoch J2000.0, ICRS)
RA: -0.00530 arcsec/yr
Dec: +0.00560 arcsec/yr

Parallax and radial velocity information
Trigonometric parallax: 0.00386 arcsec
Standard error: 0.00080 arcsec

[Fay]

I don't know what to say John!!!!!

I've never seen anything like it, I hope you haven't swallowed that big star book of yours, or perhaps you have taken part in a seance & been overtaken by Tycho Brahe!!!!!!!! (wrong spelling)
So what star is it then??

Fay

[JohnP]

No Just using SkyMap Pro...

Star name is :-

TYC 3291-1611-1 or also known as :

Tycho catalog number: TYC 3291-1611-1
Hipparcos catalog number: HIP 8063
PPM catalog number: PPM 26667
SAO catalog number: SAO 22551
HD catalog number: HD 10498
BD number: BD +50 0336 


You obviously didn't read the information I gave you.....

Most stars don't have real names just numbers......

John

PS - I'm sure Jeff could tell you all this.....

[Fay]

I was having you on, John, I could see the star name.



Fay

[Tony G]

John,
Nice to see you back, but have you got the info on the 7th star to the left of the dim one just above and to the right of the one you just left the info on.
Sorry Fay, forgot to mention what another great image from you, AGAIN!!!!

Tony G

[Fay]

Thanks Tony, I think John thinks I belong to Mensa or something.

I have not used your FR yet as I have a problem with the Canon, shutter will not fire in LX mode.
I sat out in the frost for so long for two nights, trying to sort it out, I nearly cracked in half!!!!!!


Fay

[JohnP]

Fay - you asked what it was......!!! In fact I'm sure you told me you have Starry Night Pro on your laptop so the same information would have been at your finger tips as well... You should learn to use it - as with Skymap Pro it is a very powerful program.. SMP has a database of something like 19 Million stars.

John