Movie: Dragon CRS-6, The Twilight Saga!

Yesterday I did a very successful series of observations on the just launched SpaceX Dragon CRS-6, the Falcon 9 upper stage, and the two ejected solar panel covers, all still very close together at that time, 20 minutes after the launch. See the series of photographs in my previous post.

(movie is HD, click on it to enlarge: this small window will not show it well)

Today, 15 April 2015,  saw successful observations of the Dragon CRS and the Falcon upper stage again. At 19:00 and 19:02 UT (21:00 local time, Apr 15), in very deep twilight, I observed both objects during a near-zenith pass from Leiden. Using the movie function of my Canon EOS 60D, I shot the footage above (enlarge it to full screen - it is in HD- otherwise the two objects will not be well visible).

The sun was at an altitude of only -4 degrees, the sky was still bright blue with barely a star visible (only Venus and Jupiter could be clearly seen). Yet both the Falcon r/b and the Dragon CRS could be easily seen once past culmination and descending towards the east. They were both in the negative magnitudes, due to a very favourable phase angle and short observing distance. They were very fast too: it was quite a spectacular sight!

Both objects passed with a separation of about two minutes in time. The B-object, which is probably the Falcon r/b, was first. The A-object wich is probably the Dragon CRS-6 was next. Both objects were steady in brightness.

I also tried to observe the next pass at 22:34 local time (20:34 UT) but thick cirrus clouds had filled the sky by then. I did see a hazy ISS pass at 20:16 UT but the Dragon of Falcon were not seen.

SpaceX Dragon CRS-6 and debris pieces, twenty minutes after launch

On 14 April 2015 at 20:10 UTC, one day late due to an aborted launch the day before, SpaceX launched a Falcon 9 rocket with the Dragon CRS-6 resupply mission to the ISS.

(click images to enlarge)

Falcon 9, Dragon CRS-6 and 2 debris pieces, 20 minutes after launch

I watched the live webcast of the launch, and then 20 minutes later I watched the Dragon craft make a pass through Orion low in the West, before entering Earth shadow.

With a pass so low in the west in the evening, I expected it to be faint, but it actually was easily visible by the naked eye reaching mag. +1.5 (about as bright as the brightest stars in Orion, barely fainter than Betelgeuse which it passed close by [edit: but see below...]). It was some 30-45 seconds late on Jon Mikel's estimated initial orbit.

My images show up to three additional, fainter objects (I did not see them visually) close to the Dragon (see image above which shows them al three). These are the two jettisoned solar panel covers, and either the jettisoned nose-cone or the Falcon 9 upper stage (probably the latter). Unlike the Dragon, which is steady, these three objects are irregular in brightness, as they are tumbling.

[edit 15 Apr 10:15 UT:  according to Cees Bassa the bright object is actually the Falcon 9 upper stage, the fainter object just above and very close to it the Dragon CRS-6, while the two flaring faint objects upper and bottom are the solar panel covers]

The image below is a stack (combination) of five images taken slightly earlier, showing the Dragon Falcon stage and the flashing (tumbling) debris pieces crossing the top of Orion (Betelgeuse is top left):

stack of five 2.5 second images separated by 10 seconds

Two other single shots from that sequence, showing  the debris pieces flashing up alongside the Dragon Falcon:

Dragon and ISS will berth on April 16 and I hope to have some opportunity to observe them close together.

(many thanks to Jon Mikel for his orbital estimate)