Recentelijk heb ik me de Seestar S50 gekocht. Deze volautomatische telescoop heb ik aangekocht als een travelscope en voor snelle opnames bij minder ideaal weer.
Vanavond (19 maart) was er even een gat in de wolken, dus ideaal voor een first light. Daarom snel de Seestar buitengezet. Iets zoeken uit “what’s up this night” en we gaan naar M108 of de surfboard nebula in het sterrenbeeld grote beer. Hierbij moet je enkel maar ingeven dat je de M108 wil bekijken en automatisch gaat de Seestar S50 op zoek.
Wil je de opnames starten, dan zal de Seestar automatisch een 3-ster alignment doen, een focus en een image enhancer. Als je dan klikt op opnames, dan start de Seestar zijn opnames en op je gsm of tablet krijg je een stacked preview.
Omdat ik toch wel wil vergelijken, start ik eventueel mijn GSO 200f4 met de PlayerOne 585 Pro en richt ik deze ook op de M108. Alhoewel de EQ6R Pro normaal direct moet starten, moet ik toch heel wat stappen doorlopen om NiNA te overtuigen de opnames te starten.
De seeing is niet ideaal en ik moet dan ook snel ook de opnames stoppen wegens wolken.
Ter vergelijk kan je hieronder het resultaat zien. Ik ben zwaar onder de indruk van de Seestar omdat bij een mindere seeing en een F4, het focuseren van de Newton niet ideaal werkt ondanks de NiNA focus procedure.
Hieronder kan je de Seestar native zien, een zelf gestackte Seestar en de GSO.
![SIMPLE = T / file does conform to FITS standardBITPIX = 20 / number of bits per data pixelNAXIS = 3 / number of data axesNAXIS1 = 1080 / length of data axis 1NAXIS2 = 1920 / length of data axis 2NAXIS3 = 3 / length of data axis 3EXTEND = T / FITS dataset may contain extensionsCOMMENT FITS (Flexible Image Transport System) format is defined in 'AstronomyCOMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359HBZERO = 0 / offset data range to that of unsigned shortBSCALE = 1 / default scaling factorDATE = '2024-03-18T23:00:49' / UTC date that FITS file was createdDATE-OBS= '2024-03-18T22:37:34.859890' / YYYY-MM-DDThh:mm:ss observation start, INSTRUME= 'Seestar S50' / instrument nameOBSERVER= ' ' / observer nameTELESCOP= 'Seestar S50' / telescope used to acquire this imageXPIXSZ = 2.9 / X pixel size micronsYPIXSZ = 2.9 / Y pixel size micronsXBINNING= 1 / Camera binning modeYBINNING= 1 / Camera binning modeBAYERPAT= 'GRBG ' / Bayer color patternFOCALLEN= 250 / Camera focal lengthCCD-TEMP= 17.125 / CCD temp in CEXPTIME = 20 / Exposure time [s]STACKCNT= 119 / Stack framesFILTER = 'IRCUT ' / Active filter nameIMAGETYP= 'Light ' / Type of imageOBJECT = 'M 108 ' / Name of the object of interestGAIN = 80 / Camera gainSITELAT = 50.8308 / [deg] Observation site latitudeSITELONG= 4.83639 / [deg] Observation site longitudeRA = 168.246 / Image center Right Ascension (deg)DEC = 55.5478 / Image center Declination (deg)CRPIX1 = 331.959 / Axis1 reference pixelCRPIX2 = 457.781 / Axis2 reference pixelCRVAL1 = 167.282 / Axis1 reference value (deg)CRVAL2 = 55.7732 / Axis2 reference value (deg)CDELT1 = 0.000659604 / X pixel size (deg)CDELT2 = 0.000658743 / Y pixel size (deg)PC1_1 = 0.133103 / Linear transformation matrix (1, 1)PC1_2 = 0.989707 / Linear transformation matrix (1, 2)PC2_1 = -0.992398 / Linear transformation matrix (2, 1)PC2_2 = 0.133855 / Linear transformation matrix (2, 2)HISTORY GHS pivot: 0.019, amount: 9.63, local: 15.00 [0.00 1.00]HISTORY GHS LINEAR BP: 0.09HISTORY GHS pivot: 0.212, amount: 25.14, local: 0.00 [0.00 1.00]HISTORY GHS LINEAR BP: 0.07END](https://www.vvscapella.be/wp-content/gallery/seestar/M108_autostack.jpg "SIMPLE = T / file does conform to FITS standardBITPIX = 20 / number of bits per data pixelNAXIS = 3 / number of data axesNAXIS1 = 1080 / length of data axis 1NAXIS2 = 1920 / length of data axis 2NAXIS3 = 3 / length of data axis 3EXTEND = T / FITS dataset may contain extensionsCOMMENT FITS (Flexible Image Transport System) format is defined in 'AstronomyCOMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359HBZERO = 0 / offset data range to that of unsigned shortBSCALE = 1 / default scaling factorDATE = '2024-03-18T23:00:49' / UTC date that FITS file was createdDATE-OBS= '2024-03-18T22:37:34.859890' / YYYY-MM-DDThh:mm:ss observation start, INSTRUME= 'Seestar S50' / instrument nameOBSERVER= ' ' / observer nameTELESCOP= 'Seestar S50' / telescope used to acquire this imageXPIXSZ = 2.9 / X pixel size micronsYPIXSZ = 2.9 / Y pixel size micronsXBINNING= 1 / Camera binning modeYBINNING= 1 / Camera binning modeBAYERPAT= 'GRBG ' / Bayer color patternFOCALLEN= 250 / Camera focal lengthCCD-TEMP= 17.125 / CCD temp in CEXPTIME = 20 / Exposure time [s]STACKCNT= 119 / Stack framesFILTER = 'IRCUT ' / Active filter nameIMAGETYP= 'Light ' / Type of imageOBJECT = 'M 108 ' / Name of the object of interestGAIN = 80 / Camera gainSITELAT = 50.8308 / [deg] Observation site latitudeSITELONG= 4.83639 / [deg] Observation site longitudeRA = 168.246 / Image center Right Ascension (deg)DEC = 55.5478 / Image center Declination (deg)CRPIX1 = 331.959 / Axis1 reference pixelCRPIX2 = 457.781 / Axis2 reference pixelCRVAL1 = 167.282 / Axis1 reference value (deg)CRVAL2 = 55.7732 / Axis2 reference value (deg)CDELT1 = 0.000659604 / X pixel size (deg)CDELT2 = 0.000658743 / Y pixel size (deg)PC1_1 = 0.133103 / Linear transformation matrix (1, 1)PC1_2 = 0.989707 / Linear transformation matrix (1, 2)PC2_1 = -0.992398 / Linear transformation matrix (2, 1)PC2_2 = 0.133855 / Linear transformation matrix (2, 2)HISTORY GHS pivot: 0.019, amount: 9.63, local: 15.00 [0.00 1.00]HISTORY GHS LINEAR BP: 0.09HISTORY GHS pivot: 0.212, amount: 25.14, local: 0.00 [0.00 1.00]HISTORY GHS LINEAR BP: 0.07END")
Seestar 50S autostacking
![SIMPLE = T / file does conform to FITS standardBITPIX = -32 / number of bits per data pixelNAXIS = 3 / number of data axesNAXIS1 = 983 / length of data axis 1NAXIS2 = 916 / length of data axis 2NAXIS3 = 3 / length of data axis 3EXTEND = T / FITS dataset may contain extensionsCOMMENT FITS (Flexible Image Transport System) format is defined in 'AstronomyCOMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359HBZERO = 0 / offset data range to that of unsigned shortBSCALE = 1 / default scaling factorDATE = '2024-03-18T23:05:51' / UTC date that FITS file was createdDATE-OBS= '2024-03-18T21:35:24.514086' / YYYY-MM-DDThh:mm:ss observation start, INSTRUME= 'Seestar S50' / instrument nameOBSERVER= ' ' / observer nameTELESCOP= 'Seestar S50' / telescope used to acquire this imageXPIXSZ = 2.9 / X pixel size micronsYPIXSZ = 2.9 / Y pixel size micronsXBINNING= 1 / Camera binning modeYBINNING= 1 / Camera binning modeFOCALLEN= 250 / Camera focal lengthCCD-TEMP= 21.3125 / CCD temp in CEXPTIME = 20 / Exposure time [s]STACKCNT= 108 / Stack framesLIVETIME= 2160 / Exposure time after deadtime correctionEXPSTART= 2.46039e+06 / Exposure start time (standard Julian date)EXPEND = 2.46039e+06 / Exposure end time (standard Julian date)FILTER = 'IRCUT ' / Active filter nameIMAGETYP= 'Light ' / Type of imageOBJECT = 'M 108 ' / Name of the object of interestGAIN = 80 / Camera gainSITELAT = 50.8308 / [deg] Observation site latitudeSITELONG= 4.83639 / [deg] Observation site longitudeRA = 168.246 / Image center Right Ascension (deg)DEC = 55.5478 / Image center Declination (deg)HISTORY mean stacking with winsorized sigma clipping rejection (low=3.000 high=3HISTORY .000), additive+scaling normalized input, normalized output, no image weHISTORY ighting, unequalized RGBHISTORY Crop (x=59, y=467, w=983, h=916)HISTORY Background neutralizationHISTORY GHS pivot: 0.003, amount: 13.55, local: 15.00 [0.00 1.00]HISTORY GHS pivot: 0.151, amount: 14.50, local: 0.00 [0.00 1.00]HISTORY GHS LINEAR BP: 0.08HISTORY SCNR (type=average neutral, amount=1.00, preserve=true)END](https://www.vvscapella.be/wp-content/gallery/seestar/M108Selfstacked.jpg "SIMPLE = T / file does conform to FITS standardBITPIX = -32 / number of bits per data pixelNAXIS = 3 / number of data axesNAXIS1 = 983 / length of data axis 1NAXIS2 = 916 / length of data axis 2NAXIS3 = 3 / length of data axis 3EXTEND = T / FITS dataset may contain extensionsCOMMENT FITS (Flexible Image Transport System) format is defined in 'AstronomyCOMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359HBZERO = 0 / offset data range to that of unsigned shortBSCALE = 1 / default scaling factorDATE = '2024-03-18T23:05:51' / UTC date that FITS file was createdDATE-OBS= '2024-03-18T21:35:24.514086' / YYYY-MM-DDThh:mm:ss observation start, INSTRUME= 'Seestar S50' / instrument nameOBSERVER= ' ' / observer nameTELESCOP= 'Seestar S50' / telescope used to acquire this imageXPIXSZ = 2.9 / X pixel size micronsYPIXSZ = 2.9 / Y pixel size micronsXBINNING= 1 / Camera binning modeYBINNING= 1 / Camera binning modeFOCALLEN= 250 / Camera focal lengthCCD-TEMP= 21.3125 / CCD temp in CEXPTIME = 20 / Exposure time [s]STACKCNT= 108 / Stack framesLIVETIME= 2160 / Exposure time after deadtime correctionEXPSTART= 2.46039e+06 / Exposure start time (standard Julian date)EXPEND = 2.46039e+06 / Exposure end time (standard Julian date)FILTER = 'IRCUT ' / Active filter nameIMAGETYP= 'Light ' / Type of imageOBJECT = 'M 108 ' / Name of the object of interestGAIN = 80 / Camera gainSITELAT = 50.8308 / [deg] Observation site latitudeSITELONG= 4.83639 / [deg] Observation site longitudeRA = 168.246 / Image center Right Ascension (deg)DEC = 55.5478 / Image center Declination (deg)HISTORY mean stacking with winsorized sigma clipping rejection (low=3.000 high=3HISTORY .000), additive+scaling normalized input, normalized output, no image weHISTORY ighting, unequalized RGBHISTORY Crop (x=59, y=467, w=983, h=916)HISTORY Background neutralizationHISTORY GHS pivot: 0.003, amount: 13.55, local: 15.00 [0.00 1.00]HISTORY GHS pivot: 0.151, amount: 14.50, local: 0.00 [0.00 1.00]HISTORY GHS LINEAR BP: 0.08HISTORY SCNR (type=average neutral, amount=1.00, preserve=true)END")
Seestar 50S stacking met Siril
20sec x 119 = 40 min
![SIMPLE = T / file does conform to FITS standardBITPIX = -32 / number of bits per data pixelNAXIS = 3 / number of data axesNAXIS1 = 3611 / length of data axis 1NAXIS2 = 2032 / length of data axis 2NAXIS3 = 3 / length of data axis 3EXTEND = T / FITS dataset may contain extensionsCOMMENT FITS (Flexible Image Transport System) format is defined in 'AstronomyCOMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359HBZERO = 0 / offset data range to that of unsigned shortBSCALE = 1 / default scaling factorDATE = '2024-03-18T22:53:19' / UTC date that FITS file was createdDATE-OBS= '2024-03-18T22:14:58.332000' / YYYY-MM-DDThh:mm:ss observation start, INSTRUME= 'Uranus-C PRO' / instrument nameOBSERVER= ' ' / observer nameTELESCOP= 'GSO 8" Newton' / telescope used to acquire this imageROWORDER= 'TOP-DOWN' / Order of the rows in image arrayXPIXSZ = 2.9 / X pixel size micronsYPIXSZ = 2.9 / Y pixel size micronsXBINNING= 1 / Camera binning modeYBINNING= 1 / Camera binning modeFOCALLEN= 800 / Camera focal lengthCCD-TEMP= -10 / CCD temp in CSET-TEMP= -10 / Temperature setting in CEXPTIME = 180 / Exposure time [s]STACKCNT= 5 / Stack framesLIVETIME= 900 / Exposure time after deadtime correctionEXPSTART= 2.46039e+06 / Exposure start time (standard Julian date)EXPEND = 2.46039e+06 / Exposure end time (standard Julian date)FILTER = 'Filter1 ' / Active filter nameIMAGETYP= 'LIGHT ' / Type of imageOBJECT = 'M 108 ' / Name of the object of interestGAIN = 210 / Camera gainOFFSET = 50 / Camera offsetSITELAT = 50.23 / [deg] Observation site latitudeSITELONG= 4.42 / [deg] Observation site longitudeSITEELEV= 85 / [m] Observation site elevationCTYPE1 = 'RA---TAN' / Coordinate type for the first axisCTYPE2 = 'DEC--TAN' / Coordinate type for the second axisCUNIT1 = 'deg ' / Unit of coordinatesCUNIT2 = 'deg ' / Unit of coordinatesEQUINOX = 2000 / Equatorial equinoxOBJCTRA = '11 11 31' / Image center Right Ascension (hms)OBJCTDEC= '+55 40 27' / Image center Declination (dms)RA = 135.12 / Image center Right Ascension (deg)DEC = 56.8698 / Image center Declination (deg)AIRMASS = 1.03815 / AirmassHISTORY mean stacking with winsorized sigma clipping rejection (low=3.000 high=3HISTORY .000), additive+scaling normalized input, normalized output, no image weHISTORY ighting, unequalized RGBHISTORY Crop (x=133, y=84, w=3611, h=2032)HISTORY Background neutralizationHISTORY GHS pivot: 0.012, amount: 7.63, local: 15.00 [0.00 1.00]HISTORY GHS LINEAR BP: 0.05HISTORY GHS pivot: 0.243, amount: 9.20, local: 0.00 [0.00 1.00]HISTORY GHS LINEAR BP: 0.04HISTORY SCNR (type=average neutral, amount=1.00, preserve=true)END](https://www.vvscapella.be/wp-content/gallery/seestar/M108_newton.jpg "SIMPLE = T / file does conform to FITS standardBITPIX = -32 / number of bits per data pixelNAXIS = 3 / number of data axesNAXIS1 = 3611 / length of data axis 1NAXIS2 = 2032 / length of data axis 2NAXIS3 = 3 / length of data axis 3EXTEND = T / FITS dataset may contain extensionsCOMMENT FITS (Flexible Image Transport System) format is defined in 'AstronomyCOMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359HBZERO = 0 / offset data range to that of unsigned shortBSCALE = 1 / default scaling factorDATE = '2024-03-18T22:53:19' / UTC date that FITS file was createdDATE-OBS= '2024-03-18T22:14:58.332000' / YYYY-MM-DDThh:mm:ss observation start, INSTRUME= 'Uranus-C PRO' / instrument nameOBSERVER= ' ' / observer nameTELESCOP= 'GSO 8\" Newton' / telescope used to acquire this imageROWORDER= 'TOP-DOWN' / Order of the rows in image arrayXPIXSZ = 2.9 / X pixel size micronsYPIXSZ = 2.9 / Y pixel size micronsXBINNING= 1 / Camera binning modeYBINNING= 1 / Camera binning modeFOCALLEN= 800 / Camera focal lengthCCD-TEMP= -10 / CCD temp in CSET-TEMP= -10 / Temperature setting in CEXPTIME = 180 / Exposure time [s]STACKCNT= 5 / Stack framesLIVETIME= 900 / Exposure time after deadtime correctionEXPSTART= 2.46039e+06 / Exposure start time (standard Julian date)EXPEND = 2.46039e+06 / Exposure end time (standard Julian date)FILTER = 'Filter1 ' / Active filter nameIMAGETYP= 'LIGHT ' / Type of imageOBJECT = 'M 108 ' / Name of the object of interestGAIN = 210 / Camera gainOFFSET = 50 / Camera offsetSITELAT = 50.23 / [deg] Observation site latitudeSITELONG= 4.42 / [deg] Observation site longitudeSITEELEV= 85 / [m] Observation site elevationCTYPE1 = 'RA---TAN' / Coordinate type for the first axisCTYPE2 = 'DEC--TAN' / Coordinate type for the second axisCUNIT1 = 'deg ' / Unit of coordinatesCUNIT2 = 'deg ' / Unit of coordinatesEQUINOX = 2000 / Equatorial equinoxOBJCTRA = '11 11 31' / Image center Right Ascension (hms)OBJCTDEC= '+55 40 27' / Image center Declination (dms)RA = 135.12 / Image center Right Ascension (deg)DEC = 56.8698 / Image center Declination (deg)AIRMASS = 1.03815 / AirmassHISTORY mean stacking with winsorized sigma clipping rejection (low=3.000 high=3HISTORY .000), additive+scaling normalized input, normalized output, no image weHISTORY ighting, unequalized RGBHISTORY Crop (x=133, y=84, w=3611, h=2032)HISTORY Background neutralizationHISTORY GHS pivot: 0.012, amount: 7.63, local: 15.00 [0.00 1.00]HISTORY GHS LINEAR BP: 0.05HISTORY GHS pivot: 0.243, amount: 9.20, local: 0.00 [0.00 1.00]HISTORY GHS LINEAR BP: 0.04HISTORY SCNR (type=average neutral, amount=1.00, preserve=true)END")
GSO 200f4 stacking met Siril
180sec x 5 = 15 min (merk op, veel frameverlies)