有 6253 筆資料符合您搜尋的條件

PTS
週三 15 8月, 2018 06:26
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: Semiregular variable reclassified as symbiotic
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Semiregular variable reclassified as symbiotic

AAVSO Alert Notice 648 Semiregular variable reclassified as symbiotic: outburst of ASASSN-V J195442.95+172212.6 = Vend47 (Sge) August 14, 2018 Event: ASASSN-V J195442.95+172212.6 (TCP J19544251+1722281 = Vend47), originally classified as a semiregular variable, has been reclassified as a symbiotic v...
PTS
週二 14 8月, 2018 06:35
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: Nova in Ophiuchus - N Oph 2018 No. 3
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Nova in Ophiuchus - N Oph 2018 No. 3

AAVSO Alert Notice 647 Nova in Ophiuchus - N Oph 2018 No. 3 = PNV J17422408-2053088 August 13, 2018 Event: Nova in Ophiuchus - N Oph 2018 No. 3 = PNV J17422408-2053088 Discovered by: C. Jacques, J. Barros, E. Pimentel, and P. Holvorcem, on behalf of the Brazilian Transient Search - BraTS (at SONEAR ...
PTS
週二 07 8月, 2018 05:46
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: VW Hyi in outburst and monitoring needed for multiwavelength campaign
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VW Hyi in outburst and monitoring needed for multiwavelength campaign

AAVSO Alert Notice 646 VW Hyi in outburst and monitoring needed for multiwavelength campaign August 6, 2018 : Further to AAVSO Alert Notice 640, the SU UMa-type dwarf nova VW Hyi is in outburst and is the subject of a multiwavelength campaign designed to detect possible radio emission during the out...
PTS
週三 01 8月, 2018 07:08
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: Monitoring of LPVs for Maser Study
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Monitoring of LPVs for Maser Study

AAVSO Alert Notice 645 Monitoring of LPVs for Maser Study July 31, 2018: Michael Stroh (Ph.D. candidate, University of New Mexico) requests AAVSO assistance in monitoring 20 LPVs in support of a VLA campaign studying SiO masers. AAVSO monitoring begins now and goes through October 2019. Stroh writes...
PTS
週二 31 7月, 2018 10:46
版面: 太陽觀測和攝影 Solar Observation & Photography
主題: DIY Solar Spectroscope 自制太陽光譜儀
回覆: 46
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Re:

請教: 如何對焦? There are 2 aspects for your question. 1. The solar image should be focused on the slit (by moving the whole spectroscope), 2. the eyepiece/camera should focus also on the slit (by adjusting the collimator lens). Usually, (2) is more tedious and (1) is relatively simple. btw I have retire...
PTS
週六 28 7月, 2018 07:00
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: FO Aqr monitoring requested in faint-state study
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FO Aqr monitoring requested in faint-state study

AAVSO Alert Notice 644 FO Aqr monitoring requested in faint-state study July 27, 2018: Dr. Colin Littlefield (University of Notre Dame) writes: "In both 2016 and 2017, my colleagues and I requested AAVSO campaigns on the intermediate polar FO Aquarii to study its first-ever faint states. In both cam...
PTS
週四 26 7月, 2018 06:33
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: Monitoring for Red Dots #2 campaign
回覆: 0
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Monitoring for Red Dots #2 campaign

AAVSO Alert Notice 643 Monitoring for Red Dots #2 campaign July 25, 2018: John Strachan (Ph.D. candidate, Queen Mary University of London) and Dr. Guillem Anglada-Escude (Queen Mary University of London) have requested AAVSO assistance in the monitoring of three M dwarf stars as part of the Red Dots...
PTS
週三 25 7月, 2018 19:12
版面: 天文攝影 Astrophotography
主題: 2018 July 25 Venus at Hokoon
回覆: 1
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2018 July 25 Venus at Hokoon

2018 July 25 Venus at Hokoon
camera: ASI174MC, binned 2
Telescope: 50-cm RC telescope
taken at 11:01:11 UTC
PTS
週三 25 7月, 2018 06:59
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: ASASSN-18pe observing campaign
回覆: 0
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ASASSN-18pe observing campaign

AAVSO Alert Notice 642 ASASSN-18pe observing campaign July 24, 2018: Dr. Matt Darnley (Astrophysics Research Institute, Liverpool John Moores University) and the AAVSO are requesting monitoring of ASASSN-18pe, the cataclysmic variable (possible long period dwarf nova) discovered 2018 July 10 by the ...
PTS
週三 25 7月, 2018 06:57
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: V1490 Cyg multiwavelength campaign
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V1490 Cyg multiwavelength campaign

AAVSO Alert Notice 641 V1490 Cyg multiwavelength campaign July 24, 2018: Dr. Dirk Froebrich (University of Kent) has requested AAVSO observations to support their upcoming observations of V1490 Cyg. He writes: "Background: We have recently discovered that the young star V1490 Cyg (situated in the Pe...
PTS
週五 06 7月, 2018 06:48
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: Immediate Montitoring of VW Hyi Requested
回覆: 0
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Immediate Montitoring of VW Hyi Requested

AAVSO Alert Notice 640 Immediate Montitoring of VW Hyi Requested July 5th, 2018: Dr. Christian Knigge has requested immediate monitoring of the SU Uma-type dwarf Novae VW Hyi in order to promptly identify the next outburst. This outburst will trigger radio wavelength observations. As this object has...
PTS
週三 04 7月, 2018 08:17
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: CH Cyg coverage requested
回覆: 0
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CH Cyg coverage requested

AAVSO Alert Notice 639 CH Cyg coverage requested July 3, 2018: The symbiotic variable CH Cyg is undergoing a fade that began on June 25. Multicolor photometry is requested; V and particularly B should take priority over Rc and Ic. Observations made two to three times a week are sufficient; time seri...
PTS
週二 03 7月, 2018 08:48
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: Nova in Scutum - N Sct 2018
回覆: 0
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Nova in Scutum - N Sct 2018

AAVSO Alert Notice 638 Nova in Scutum - N Sct 2018 = TCP J18292290-1430460 July 2, 2018 Event: Nova in Scutum - N Sct 2018 = TCP J18292290-1430460 Discovered by: Yukio Sakurai (Mito, Japan) Discovery magnitude: unfiltered CCD magnitude 10.3, on two frames using Nikon D7100 digital camera + 180-mm f/...
PTS
週四 28 6月, 2018 14:05
版面: 太陽觀測和攝影 Solar Observation & Photography
主題: 2018 June 28 Sun - AR12715
回覆: 2
觀看: 221

Re: 2018 June 28 Sun - AR12715

more images
PTS
週四 28 6月, 2018 14:04
版面: 太陽觀測和攝影 Solar Observation & Photography
主題: 2018 June 28 Sun - AR12715
回覆: 2
觀看: 221

2018 June 28 Sun - AR12715

2018 June 28 Sun - AR12715 AR12715 is right on the W limb. There is no visible sunspots. One or two small flares appear among the filaments and plages. As the slow motion is still unavailable, I have to continue with push or pull the telescope to put the image in field. This task becomes very tediou...

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