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Caught: a satellite on amateur astronomer’s first video?

Posted 03-20-2009 by Daniel Pendick

Web cam videoCheck out this video from Astronomy reader Robert Massey of Fort Worth, Texas. Look to the top left of the grouping of four bright stars, at about the 11 o’clock position. A blob appears to move to the left.

The video shows an object — a satellite or perhaps an asteroid? — tumbling through the field of view of Massey’s Meade 12-inch LX200 telescope. At the time he was observing M42, the Orion Nebula.

In his own words: “I have been behind a telescope for a little over a year. I recently bought an LX200 and started taking video with it. On March 2nd at 8:17 p.m., I was looking at Orion and saw an object flying though the pic. I hit record and looked up to see nothing. The video shows the item tumbling. I’m just wondering if this is normal or may be of interest. Thanks.”

I received that e-mail last week. Intrigued, I asked him to send me the video clip. At first I didn’t see anything and started to wonder if Massey was mistaking electronic noise in the camera for something real. He sent a lightened version of the clip to me and, sure enough, there is something in the sky.

Like I said, maybe a satellite or an asteroid. Who knows? The coolest thing about this incident is how it closes the sometimes-invisible circuit between the magazine and our readers.

Massey got interested in telescope video because of an article we ran in November 2008 on amateur astronomy with a web cam. He hot-glued a web cam onto a piece of tubing to adapt it to his telescope. He used free software available on the Web to run it.

Massey’s no engineer, but he knows how to fit tubes together — he’s a plumber. He bought his first scope only a year ago at a thrift store. “I like galaxies the most,” he said, “but have not been able to photograph them well yet. I’m planning to get out to a dark-sky location soon and try again. But nebulae, planets, and planetary nebulae are my other interests.”

For now, with his new LX200 and a backyard that is “not all that dark,” Massey is exploring the universe. We are glad to have been of assistance.

Comments



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  • tkerr said:

    Because of Orion's proximity to the celestial equator, that is an area populated by numerous satellites.

    Observers often observe Satellites rapidly moving through their field of view in the area of the Orion Nebula and even the area of Orion's belt.  Astrophotographers often capture them in their images, sometimes multiple satellites in a single frame.  

    March 20, 2009 10:07 AM
  • Kevin Bozard said:

    My best guess for what Robert captured is that it is the GOES 13 Geosynchronous Satellite, which passed very close to the nebula on that date, at that approximate time. This isn't an uncommon occurrence, but I've seen very few captured on video web cams. Good job on capturing this one Robert! :)

    March 20, 2009 10:07 AM
  • kurtisw said:

    Based on some rough estimation, I'd suspect this may be a geosynchronous satellite.  

    I'd guesstimate that the image is about 8 arcminutes across, and the object tracks across about a third of that in 11 seconds. That works out to a rate of about 15 arcminutes a minute, which is the rotation rate of the Earth (and the orbital angular speed of geosynch satellites).

    I think more careful measurements are needed to confirm this, and I don't have time to do those (sorry!), but the rate of motion is too slow for a low-Earth orbit, and too high for a main-belt asteroid.

    March 20, 2009 11:27 AM
  • Daniel Pendick said:

    Thanks for the comments! That's cool that you can make an educated guess about which satellite it might have been. How certain can we be it wasn't an asteroid?

    March 20, 2009 1:44 PM
  • Bossman said:

    It looks as if theres a ghost form behind it I don't know well your lucky I might never see something like or not?

    March 20, 2009 2:07 PM
  • tkerr said:

    Not so much an educated guess as you might think.  A lot of us refer to heavens-above.com who tracks all those objects in orbit around the Earth. They can tell you exactly when a Satellite or other objects will be in a specific area at a specific time. I remember not so long ago when I was imaging the Orion nebula. In many of my subframes you could see objects trailing through the image in approximately the same area. In a few frames it even looked as though there were three flying a V formation. That's when I learned it is a common to view Satellites in orbit on or near the Celestial Equator which goes right through Orion.
    March 20, 2009 2:51 PM
  • Daniel Pendick said:

    Thanks for the info! I'll have to try some satellite spotting sometime. I've seen lots of then naked-eye from dark locations, but never through a telescope.

    March 23, 2009 9:40 AM
  • Kevin Bozard said:

    Satellites are a common observance through a telescope for me. This past Friday night, I saw several satellites pass through the field of view. One while observing Hubble's Variable, and two others while observing first M81 & M82, and the other while observing M51. :)

    March 23, 2009 10:06 AM
  • walt9129 said:

    A very interesting video. Congratulations.

    It reminded me, about 18/19 months ago, I was observing some double stars in Hercules using my 20x80 binoculars when suddenly a meteor striked by, straight across my field of view. It was very late, a deep silence around me and suddenly ... (laughs). A big thrill, no doubt.

    April 1, 2009 11:32 PM
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