Venus eastern elongation

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RMSteele
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Venus eastern elongation

Post by RMSteele »

2019 December 11. 0930 to 0935 UT. Melbourne, Vic, Aus. 102mm mak f13 x185. Seeing varied Ant IV to III. Bright twilight. Phase estimated 85% by eye. Terminator even and uniformly shaded. Limb uniformly bright. Cusp regions and disc featureless. The planet was crisply defined at intervals of steady seeing. Kind regards Bob

RMSteele
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Re: Venus eastern elongation

Post by RMSteele »

2019 December 17 0925 to 0935 UT. Melbourne, Vic, Aus. 102mm mak f13 x185. Seeing Ant IV to III with moments of good definition. Terminator even and uniformly shaded. Cusps regular and no brighter than the general hue of the disc, which was a very pale yellow. The limb was white and uniformly brighter than the disc. Kind regards, Bob

RMSteele
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Re: Venus eastern elongation

Post by RMSteele »

2019 December 19, 0940 to 0945UT. Melbourne, Vic, Aus. 102mm mak f13 x185. Seeing Ant IV, the impression was much the same as 17 Dec. It’s going to be 40C+ tomorrow so the seeing won’t be great. Kind regards, Bob

RMSteele
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Re: Venus eastern elongation

Post by RMSteele »

Hello, no observing today. The temperature here hit 44C today and you can smell woodsmoke in the air from the bush fires near Sydney 800 km away to the west. Melbourne was blanketed in haze. There might some interesting sunset colours this evening. Kind thoughts, Bob

RMSteele
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Re: Venus eastern elongation

Post by RMSteele »

2019 December 21, 0937 to 0945 UT. Melbourne, Vic, Aus. 102mm mak f13 x185. Seeing Ant IV to III. The limb was bright and the terminator evenly shaded. The disc itself seemed not to be uniformly bright. From the terminator roughly up to a line bisecting the cusps, the disc appeared lightly shaded (BAA Venus scale 3), whereas the area up to the limb seemed brighter (BAA Venus scale 2. Kind thoughts, Bob

RMSteele
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Re: Venus eastern elongation

Post by RMSteele »

2019 December 26, 0930 UT. Melbourne, Vic, Aus. 102 mak f13 x185. Seeing Ant III with very steady intervals. The terminator was even and broadly shaded at mid-disc. The limb band was narrow and fairly bright. Cusp caps not visible. A faint shading was strongly suspected, extending east-west at mid-disc latitudes.
Regards, Bob

RMSteele
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Re: Venus eastern elongation

Post by RMSteele »

2020 January 05, 0910 UT. Townsville, Queensland, Aus. 102mm mak f13 x185. Seeing Ant IV. First view of Venus from the tropics. Unfortunately the image was too unsteady to make out more than the phase. Future observations will have to be made earlier in the evening (local time) here when Venus is higher in the sky. The Moon was at a high altitude here and gave a much better view at Ant III seeing. Regards, Bob

RMSteele
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Re: Venus eastern elongation

Post by RMSteele »

2020 January 08, 0855 UT. Townsville, QLD, Australia. 102mm mak f13 x185. Seeing Ant IV - III variable. Bright evening twilight. The limb band was bright and narrow, while the terminator was soft and evenly shaded. Phase appeared to be 80%, estimated by eye. The northern cusp seemed brighter than the s. cusp. No disc features noted.
Kind regards, Bob
Last edited by RMSteele on Fri Jan 10, 2020 8:29 am, edited 1 time in total.

RMSteele
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Re: Venus eastern elongation

Post by RMSteele »

2020 Jan 09, 0800 UT. Townsville QLD. 102mm mak f13, x185. Seeing Ant III, sky bright. Limb regions bright, terminator even and softly shaded. The northern cusp region again appeared slightly brighter than the s cusp, although the difference not so marked as yesterday. A faint shading strongly suspected in the southern region of the disc adjacent to the terminator. Just a note on sky transparency: here in Townsville, south of the Tropic of Capricorn, the humidity is generally high (mid-summer) and this creates a fair bit of sky haze, giving no better than fair transparency at the altitude of Venus.
Regards, Bob

RMSteele
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Re: Venus eastern elongation

Post by RMSteele »

2020 Jan 10, 0800 UT. Townsville QLD. 102mm mak f13, x185. Seeing Ant IV - III varies. Sky bright. Venus presents much the same appearance as yesterday with the s cusp seeming slightly duller than the n cusp. In steady moments I repeatedly suspected “streakiness” in both hemispheres of the planet. All of this in integrated light and I am missing my preferred combination of W15 and W58 filters stacked for Venus disc examination (I haven’t brought any filters with me). At this apparition, my location in the southern tropics means that Venus stands at a reasonable altitude in the late afternoons.
Kind thoughts, Bob

RMSteele
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Re: Venus eastern elongation

Post by RMSteele »

2020 Jan 11, 0745 UT. Townsville, QLD. 102mm mak f13, x185. Seeing Ant IV. Sky bright.
Unremarkable, an unsteady bland disc. I have seen observational drawings made in such conditions that show delicate features: they are completely unreliable. Any beginners reading this should take note. Don’t strain to see in unsteady conditions, where Venus is concerned, you’ll repeatedly catch illusory banding.
Kind thoughts, Bob

RMSteele
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Re: Venus eastern elongation

Post by RMSteele »

2020 Jan 12. No observation of Venus today because the western sky is laced with cloud and humid haze. Although there is a clear sky most afternoons, here in the “dry” southern tropics, one or two factors make Venus harder to pick up in a daylight sky than in the British skies that we all moan about. Firstly the ecliptic makes a much steeper angle with the horizon and the northern temperate observer here will tend to “sweep” low and miss it. Secondly the sky is BRIGHT with much more intensely diffused light in the direction of the Sun. The latter factor means that I have not yet succeeded in picking up Venus initially with binoculars, as I do at home. It has to be swept for from the start in the mak at x40. However, it has to be said that the fact that Venus can be viewed much more frequently makes up for the other snags.
Kind thoughts, Bob

RMSteele
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Re: Venus eastern elongation

Post by RMSteele »

2020 Jan 14, 0730 UT. Townsville QLD. 102mm mak x185. Seeing Ant IV with some steady moments. Sky bright.
This is the first time that I’ve been able to sweep Venus up with 8x40 binocs in a clean blue sky.
In the telescope the limb was well defined in good moments, slightly brighter than the inner disc and the terminator and cusps were even. The cusps appeared evenly matched in brightness. Overall there was nothing about the disc to remark on, given the general unsteadiness in the seeing.
Kind thoughts, Bob

RMSteele
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Re: Venus eastern elongation

Post by RMSteele »

2020 Jan 15, 0800 UT. Townsville QLD. 102mm mak f13 x185. Seeing Ant III. Sky bright.
A regular and featureless disc. Limb region a little brighter than the general disc hue, terminator even and shaded, cusps regular and equally bright.
Regards, Bob

RMSteele
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Re: Venus eastern elongation

Post by RMSteele »

2020 Jan 16, 0740 UT. Townsville QLD. 102mm mak f13, x185. Seeing Ant IV. Sky bright.
The cusps were regular and equally bright, the limb a little brighter than the general disc. The terminator appeared broad and dusky but this could very well have been an effect of the tremulous seeing.
Regards, Bob

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