NEWS FLASH: [B.O.L.O.] BETELGEUSE DIMMING AGAIN!!!!
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NEWS FLASH: [B.O.L.O.] BETELGEUSE DIMMING AGAIN!!!!
https://www.skyatnightmagazine.com/news ... -explained
Well I've just heard a rumour from my connections in the IRA, that it's at it again.
Look and see for yourself. A refreshing change, this is a project you can do in full moon, or from a moderately light polluted city.
I have found that Rigel, Procyon and Aldebaran are excellent comparison stars for visual naked eye observations. Betelgeuse [Mv0.50] should be about midway in brightness between Rigel [Mv 0.13] and Aldebaran [Mv 0.86] and very close to Procyon. Here are the magnitudes of other stars visible in the night sky at the same time. Acrux and Achernar are not visible from higher latitudes in the northern hemisphere. For southern hemisphere observers, Betelgeuse is midway between and closer to the brightness of Procyon [Mv 0.34].
For southern hemisphere observers, Betelgeuse [Mv 0.50] is nicely and closely bracketed in between Achernar [Mv 0.46] and Hadar [Mv 0.61].
Here's a list of comparion stars and brightnesses (Wikipedia)
.
I've included a finder chart.
.
Joe
Amateur astronomer since 1978...................Web site : http://joe-cali.com/
Scopes: ATM 18" Dob, Vixen VC200L, ATM 6"f7, Stellarvue 102ED, Saxon ED80, WO M70 ED, Orion 102 Maksutov, ST80.
Mounts: Takahashi EM-200, iOptron iEQ45, Push dobsonian with Nexus DSC, three homemade EQ's.
Eyepieces: TV Naglers 31, 17, 12, 7; Denkmeier D21 & D14; Pentax XW10, XW5, Unitron 40mm Kellner, Meade Or 25,12
Cameras : Pentax K1, K5, K01, K10D / VIDEO CAMS : TacosBD, Lihmsec.
Cam/guider/controllers: Lacerta MGEN 3, SW Synguider, Simulation Curriculum SkyFi 3+Sky safari
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- DeanD
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Re: NEWS FLASH: [B.O.L.O.] BETELGEUSE DIMMING AGAIN!!!!
Of course, the giant bat nebula that filled my
For a second I thought I was in Mordor with a giant Nazgul darkening the sky. For the confused among you, it was a fruit bat.
Binos: Steiner Wildlife XP 10x26, Swarovski 8x30 Habicht, Zeiss SFL 8x40, Vanguard Endeavour 10.5x45, Fuji FMTR-SX 10x50, Tak 22x60, Orion Resolux 15x70
Eyepieces: way too many (is that possible?), but I do like my TV 32mm plossl, 13mm Nagler T6, 27mm Panoptic and 3-6mm Nagler zoom, plus Fujiyama 18mm and 25mm orthos and Tak 7.5mm LE
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Re: NEWS FLASH: [B.O.L.O.] BETELGEUSE DIMMING AGAIN!!!!
Hi Dean,DeanD wrote: ↑Sat Feb 24, 2024 11:49 am This is not easy naked eye, as they are so far apart; but from a quick look just now, I felt that Betelgeuse was only marginally brighter than Aldebaran: closer to that than to Procyon. A wild approximation, but I would say it is more like 0.6-0.7 than 0.5.
Of course, the giant bat nebula that filled my fov while looking in the binos probably didn't help!
For a second I thought I was in Mordor with a giant Nazgul darkening the sky. For the confused among you, it was a fruit bat.
I found that if I stand facing south, I can quickly turn my head from Betelgeuse to Achernar to Hadar and back. I think speed is the key. Moving a scope from one to the other would take too long. I do have two ST80’s. I can envisage pointing one at Betelgeuse and one at Achernar with the eyepieces next to each other. But the eyepieces would also need to be identical matches and I don't have any bino pairs.
Read my observation report in the observing reports sub forum.
viewtopic.php?f=6&t=33631
Visually, I couldn’t pick up any dimming. I then performed a simple photographic photometry experiment that also found no dimming.
Joe
Amateur astronomer since 1978...................Web site : http://joe-cali.com/
Scopes: ATM 18" Dob, Vixen VC200L, ATM 6"f7, Stellarvue 102ED, Saxon ED80, WO M70 ED, Orion 102 Maksutov, ST80.
Mounts: Takahashi EM-200, iOptron iEQ45, Push dobsonian with Nexus DSC, three homemade EQ's.
Eyepieces: TV Naglers 31, 17, 12, 7; Denkmeier D21 & D14; Pentax XW10, XW5, Unitron 40mm Kellner, Meade Or 25,12
Cameras : Pentax K1, K5, K01, K10D / VIDEO CAMS : TacosBD, Lihmsec.
Cam/guider/controllers: Lacerta MGEN 3, SW Synguider, Simulation Curriculum SkyFi 3+Sky safari
Memberships Astronomical Association of Queensland; RASNZ Occultations Section; Single Exposure Milky Way Facebook Group (Moderator) (12k members), The Sky Searchers (moderator)
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Re: NEWS FLASH: [B.O.L.O.] BETELGEUSE DIMMING AGAIN!!!!
I'm happy that you made a post on just that, I'll be on the lookout even more. thx.
REFRACTOR , TS-Optics Doublet SD-APO 125 mm f/7.8 . Lunt 80mm MT Ha Doublet Refractor .
EYEPIECES, Delos , Delite and 26mm Nagler t5 , 2 zoom Svbony 7-21 , Orion Premium Linear BinoViewer .
FILTER , Nebustar 2 tele vue . Apm solar wedge . contrast booster 2 inches .
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“Your assumptions are your windows on the world. Scrub them off every once in a while, or the light won't come in.”
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Re: NEWS FLASH: [B.O.L.O.] BETELGEUSE DIMMING AGAIN!!!!
A visual comparison with a star of similar brightness but a different colour like Procyon is very difficult not just because they are relatively far apart in the sky, but also because our eyes are less sensitive to the red end of the spectrum. In fact this could be why I felt it was closer in brightness to Aldebaran than Procyon, even when I tried in and out of focus.
Keep up the good work!
Dean
Binos: Steiner Wildlife XP 10x26, Swarovski 8x30 Habicht, Zeiss SFL 8x40, Vanguard Endeavour 10.5x45, Fuji FMTR-SX 10x50, Tak 22x60, Orion Resolux 15x70
Eyepieces: way too many (is that possible?), but I do like my TV 32mm plossl, 13mm Nagler T6, 27mm Panoptic and 3-6mm Nagler zoom, plus Fujiyama 18mm and 25mm orthos and Tak 7.5mm LE
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Re: NEWS FLASH: [B.O.L.O.] BETELGEUSE DIMMING AGAIN!!!!
And Betelgeuse is the brightest star in the sky in near infrared.
Graeme
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Re: NEWS FLASH: [B.O.L.O.] BETELGEUSE DIMMING AGAIN!!!!
The linear regression has a correlation of 0.998 between measured star intensity and listed magnitude. This is far better than I expected. Almost too good to be true.
Joe
Amateur astronomer since 1978...................Web site : http://joe-cali.com/
Scopes: ATM 18" Dob, Vixen VC200L, ATM 6"f7, Stellarvue 102ED, Saxon ED80, WO M70 ED, Orion 102 Maksutov, ST80.
Mounts: Takahashi EM-200, iOptron iEQ45, Push dobsonian with Nexus DSC, three homemade EQ's.
Eyepieces: TV Naglers 31, 17, 12, 7; Denkmeier D21 & D14; Pentax XW10, XW5, Unitron 40mm Kellner, Meade Or 25,12
Cameras : Pentax K1, K5, K01, K10D / VIDEO CAMS : TacosBD, Lihmsec.
Cam/guider/controllers: Lacerta MGEN 3, SW Synguider, Simulation Curriculum SkyFi 3+Sky safari
Memberships Astronomical Association of Queensland; RASNZ Occultations Section; Single Exposure Milky Way Facebook Group (Moderator) (12k members), The Sky Searchers (moderator)
- OzEclipse Online
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Re: NEWS FLASH: [B.O.L.O.] BETELGEUSE DIMMING AGAIN!!!!
Joe
Amateur astronomer since 1978...................Web site : http://joe-cali.com/
Scopes: ATM 18" Dob, Vixen VC200L, ATM 6"f7, Stellarvue 102ED, Saxon ED80, WO M70 ED, Orion 102 Maksutov, ST80.
Mounts: Takahashi EM-200, iOptron iEQ45, Push dobsonian with Nexus DSC, three homemade EQ's.
Eyepieces: TV Naglers 31, 17, 12, 7; Denkmeier D21 & D14; Pentax XW10, XW5, Unitron 40mm Kellner, Meade Or 25,12
Cameras : Pentax K1, K5, K01, K10D / VIDEO CAMS : TacosBD, Lihmsec.
Cam/guider/controllers: Lacerta MGEN 3, SW Synguider, Simulation Curriculum SkyFi 3+Sky safari
Memberships Astronomical Association of Queensland; RASNZ Occultations Section; Single Exposure Milky Way Facebook Group (Moderator) (12k members), The Sky Searchers (moderator)
- DeanD
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Re: NEWS FLASH: [B.O.L.O.] BETELGEUSE DIMMING AGAIN!!!!
Binos: Steiner Wildlife XP 10x26, Swarovski 8x30 Habicht, Zeiss SFL 8x40, Vanguard Endeavour 10.5x45, Fuji FMTR-SX 10x50, Tak 22x60, Orion Resolux 15x70
Eyepieces: way too many (is that possible?), but I do like my TV 32mm plossl, 13mm Nagler T6, 27mm Panoptic and 3-6mm Nagler zoom, plus Fujiyama 18mm and 25mm orthos and Tak 7.5mm LE
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