CentaurZ

I've created the following five preview graphics related to Comet C/2020 F3 NEOWISE:

13 minutes ago, HaleBopp2007 said:

These look great! Except for the last one. I don't think the comet was so dim today. A 3rd magnitude comet would not be naked eye visible in the twilight. I think the comet is brighter than in your ephemerids. 

Thanks for your observational report of comet brightness. I used JPL magnitude parameters for computer input. Their ephemeris magnitudes are in agreement with mine.

Estimates of future magnitudes can be wildly off for comets. Your magnitude estimate made by current observation is far more likely to be correct.

My graphics for Comet C/2020 F3 NEOWISE:

My graphics for Comet C/2020 F3 NEOWISE:

Elusive Mercury has commenced its apparition in the predawn eastern sky following its inferior conjunction between Earth and Sun on 2020 JUN 30. This a moderately favorable apparition for observers worldwide.

Photos and descriptions of Mercury during this apparition would be welcome additions to this thread.

Asteroid 2 Pallas is already out all night for northern hemisphere observers due to its current northern declination. It will appear within Sagitta in opposition to the Sun on 2020 JUL 15 at magnitude +9.6.

Pallas has a high orbital eccentricity and inclination with a mean diameter of 512 km.  It was discovered in 1802.

Photos and descriptions of Pallas would be welcome additions to this thread.

A Penumbral Lunar Eclipse will be presented to many observers with clear skies in the Americas, Europe and Africa during the night of 2020 JUL 04-05. The Earth’s penumbra is its relatively bright fringe shadow surrounding its much darker inner shadow called the umbra. At maximum eclipse, 35% of the Moon’s diameter will be covered by the penumbra. The Moon’s nearest limb to the umbra will miss it by 65% of the Moon’s diameter. Often a penumbral lunar eclipse is hardly noticeable, as will likely be the case this time.

2020 is an unusual year in which there are four lunar eclipses, and all of them penumbral. The next umbral eclipse will be total and occur on 2021 MAY 26.

Below is my preview graphic for the upcoming penumbral eclipse as seen against an imaginary blue wall to make the shadow fully apparent. The predicted event timings are in CDT (UT-5), but will occur at essentially the same real time for all observers experiencing nighttime. The depicted orientation and Moon altitudes are for an observer in Chicago.

Photos and descriptions of the eclipse would be welcome additions to this thread.

When July begins, both Jupiter and Saturn will be rising about an hour after sunset. Jupiter will appear in opposition from the Sun during the night of July 13-14. Saturn will do so during the night of July 19-20. On their opposition dates they will appear out all night.

On December 21 the two will appear to have an angular separation of only 6.1 arcminutes, the narrowest since 1623 and until 2080. However, those separations are not small enough for Jupiter to occult Saturn. The last such occultation occurred in 6857 BC, while the next two will both occur during 7541.

Conjunctions between the two occur about every 20 years. That’s their mutual synodic (lapping) period with a mean value of 19.86 years. Sometimes the conjunctions are triple due to the effect of apparent retrograde motion, but not this time.

Photos and descriptions of Jupiter, Saturn and their natural satellites would be welcome additions to this thread.

The Lunar X may be seen by telescopic observers in the Americas during the evening of Saturday 2020 JUN 27 for an approximately four-hour period centered on 22:23 CDT (JUN 28 – 03:23 UT). The X should appear as the Sun rises on the clustered rims of the craters Blanchinus, La Caille and Purbach, while a waxing Half Moon graces the sky.

This is something to check-off from your astronomical “to-do” list. Photos and descriptions of the Lunar X would be welcome additions to this thread.

It’s nearly time for my monthly New Moon spotting challenge. I use the term New Moon in its classical sense of one’s first sighting of the Moon after its monthly solar conjunction (Dark Moon). Sharp-eyed observers may attempt to spot the less than one-day-old Moon after sunset on Sunday, June 21^st.

Photos and descriptions of the young crescent Moon late this month would be welcome additions to this thread.

On 17/06/2020 at 06:22, lukebl said:

The forecast has now changed to cloudy!

It is amazing to live in a climate where it's still impossible to predict the weather more than two days ahead.

Yet this occultation was predicted quite precisely many decades ago. 🧐

15 hours ago, Demonperformer said:

6857BC was before even my time. What was the duration of the entire event?

Back then I didn't have an accurate watch, so it was hard to tell. 😉

Six arcminutes of separation? Come on, that's rather unimpressive compared with an actual occultation. 😉

Apparently a few of you were not paying attention when Jupiter last occulted Saturn in 6857 BC. No problem really. You’ll get two more opportunities, both in the year 7541. Just keep eating your Wheaties. 😃

Below is my rendering of the most recent occultation of Saturn by Jupiter in case you missed it. Of course Saturn was actually behind Jupiter as many of you would have seen, but I’ve pushed Saturn to the front through the artifice of X-ray vision.

Asteroid 7 Iris currently rises in the evening as the sky darkens. It will appear within Sagittarius in opposition to the Sun on 2020 JUN 28 at magnitude +8.9.

Iris is a stony asteroid with a mean diameter of 199 km.  It was discovered in 1847.

Photos and descriptions of Iris would be welcome additions to this thread.

9 hours ago, davhei said:

That is some great info.

 

I would be very grateful if I could receive data for the start of immersion and emersion for my location:

Lat: 59 deg 20' N

Long: 18 deg 5' E

Elev: 10 meters

Time zone: UTC+2

Many thanks in advance!

 

Here it is. Confirmation of my timings would be appreciated. 😀

Brilliant Venus has commenced its apparition in the predawn eastern sky following its inferior conjunction between Earth and Sun on 2020 JUN 03. It will become its brightest in early July and its highest in early September.

Photos and descriptions of Venus during this apparition would be welcome additions to this thread.

I might add that before sunrise the event will be fully visible in portions of Canada near the Atlantic, and as an emersion in New England.

On 07/06/2020 at 16:29, Captain Magenta said:

Ah my apologies! I hadn't realized it was such a significant event, else I wouldn't have trespassed on what is most definitely your turf!

Magnus

LOL. 😃 Of course you were quite right to to provide a heads-up in this forum as soon as you were aware. You are to be saluted. 

I created my graphics months ago, but was waiting to post until the event time came nearer. The event is not Earth-shattering, but is worth taking the time to watch, as it occurs infrequently for observers at specific locations. What's especially unusual is for Venus to appear as a crescent during an occultation. It may seem unfortunate for the occultation to occur during the daytime in Eurasia, but that's the usual case with the inferior planets. 

You beat me to it by hours, Captain; nevertheless I'll post what I had already written.

______________________________________________________________________________

The 4% illuminated waning crescent Moon will occult (cover) magnitude -3.8 crescent Venus on Friday 2020 JUN 19.

Before sunrise the event will be fully visible in portions of Canada near the Atlantic, and as an emersion in New England.

This will be visible to observers in much of Eurasia including the British Isles. However, it will happen during the daytime.

A telescope or binoculars will likely be necessary. Take care to avoid aiming at the Sun.

The immersion will occur on the lunar bright limb, with emersion on the dark limb. Any observers on the graze path can witness an interrupted Venus appearing to pass through lunar hills and valleys. Those north of the only graze path will see a full occultation.

Photos and descriptions of the occultation would be welcome additions to my similar thread in the forum for Observing-Lunar. 

If you would like specific occultation or graze predictions for your location, please reply in my other thread with your longitude, latitude, elevation and time zone.

Details for observers in London:

The 4% illuminated waning crescent Moon will occult (cover) magnitude -3.8 crescent Venus on Friday 2020 JUN 19.

Before sunrise the event will be fully visible in portions of Canada near the Atlantic, and as an emersion in New England.

This will be visible to observers in much of Eurasia including the British Isles. However, it will happen there during the daytime.

A telescope or binoculars will likely be necessary. Take care to avoid aiming at the Sun.

The immersion will occur on the lunar bright limb, with emersion on the dark limb. Any observers on the graze path can witness an interrupted Venus appearing to pass through lunar hills and valleys. Those north of the only graze path will see a full occultation.

Photos and descriptions of the occultation would be welcome additions to this thread. 

If you would like specific occultation or graze predictions for your location, please reply to this post with your longitude, latitude, elevation and time zone.

Details for observers in London:

It’s nearly time for my monthly New Moon spotting challenge. I use the term New Moon in its classical sense of one’s first sighting of the Moon after its monthly solar conjunction (Dark Moon). Sharp-eyed observers may attempt to spot the over one-day-old Moon after sunset on Saturday, May 23^rd.

Photos and descriptions of the young crescent Moon late this month would be welcome additions to this thread.

Elusive Mercury has commenced its apparition in the western sky after sunset following its superior conjunction behind the Sun on 2020 MAY 04.

Photos and descriptions of Mercury during this apparition would be welcome additions to this thread.

The annual Eta Aquariid Meteor Shower is already underway. It is expected to peak during the nights of 2019 MAY 04-05 & 05-06, but for as many as three nights on either side the rate should be near the peak. Its radiant is in the constellation Aquarius. That is the direction toward which the meteor tails point, but the meteors are equally likely to appear anywhere in your sky. The Eta Aquariids are debris from the famous Comet Halley.

The Eta Aquariids usually produce about fifty meteors per hour for sharp eyed observers in the southern hemisphere. Expectations are somewhat lessened for northern hemisphere observers due to Aquarius being a southern constellation. The show begins after midnight when Aquarius rises. It will continue through morning twilight. The waxing gibbous Moon during the peak this year may provide some interference until it sets.

Descriptions of the shower or perhaps even lucky photos would be welcome additions to this thread.

The Lunar X may be seen by telescopic observers in the Americas during the evening of Wednesday 2020 APR 29 for an approximately four-hour period centered on 22:31 CDT (APR 30 – 03:31 UT). The X should appear as the Sun rises on the clustered rims of the craters Blanchinus, La Caille and Purbach, while a waxing nearly Half Moon graces the sky.

This is something to check-off from your astronomical “to-do” list. Photos and descriptions of the Lunar X would be welcome additions to this thread.