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planet4589's profile
Jonathan McDowell
Jonathan McDowell
Jonathan McDowell
Verified account
@planet4589

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Jonathan McDowellVerified account

@planet4589

Astronomer at (but not speaking for, duh) the Center for Astrophysics, working on Chandra and quasars, and commenting on space launches and space activities.

Somerville, MA, USA
planet4589.org
Joined January 2009

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    1. Jonathan McDowell‏Verified account @planet4589 11 Sep 2018

      Over the past couple of weeks, asteroid astronomers have found a number of new uncataloged and unidentified objects in elliptical Earth orbits. According to analysis by Bill Gray, the objects are small and with high area-to-mass ratio - possibly pieces of insulation..

      9 replies 31 retweets 80 likes
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    2. Jonathan McDowell‏Verified account @planet4589 11 Sep 2018

      A number of the objects have perigees in the 2000-7000 km range, apogees in the 60,000-80,000 km range, and inclinations between 9 and 25 degrees (although one is at 47 deg).

      1 reply 3 retweets 13 likes
      Show this thread
    3. Jonathan McDowell‏Verified account @planet4589 11 Sep 2018

      This seems to me like stuff coming off a sat in supersync transfer orbit - I thought perhaps SES-12 but the orbits don't match up.

      2 replies 1 retweet 14 likes
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      Jonathan McDowell‏Verified account @planet4589 11 Sep 2018

      So if anyone has a high orbit satellite that's been losing insulation lately, let me know.

      7:39 PM - 11 Sep 2018
      • 6 Retweets
      • 47 Likes
      • Windie Wx SupernovaStyle Science News Gator C W Nim Sudo Matt Monson Francis Picotte JP Burke Mike Grusin
      3 replies 6 retweets 47 likes
        1. B1zzle‏ @B1zzle 11 Sep 2018
          Replying to @planet4589

          fresh out

          0 replies 0 retweets 0 likes
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        2.  👾 Justin Cowart  👾‏ @jccwrt 11 Sep 2018
          Replying to @planet4589

          Maybe the booster for Intelsat 31? Orbit details match up at a quick glance, plus it suffered a second stage anomaly on the way up. ¯\_(ツ)_/¯http://spaceflight101.com/proton-second-stage-anomaly-intelsat-31/ …

          1 reply 0 retweets 0 likes
        3. Jonathan McDowell‏Verified account @planet4589 11 Sep 2018
          Replying to @jccwrt

          Hmm, 2nd stage problem wouldn't affect the 4th stage though. But it's a possibility, thanks.

          1 reply 0 retweets 0 likes
        4. Show replies
        1. Ailvess‏ @Ailvess 11 Sep 2018
          Replying to @planet4589

          It’s the revenge of Zuma!

          0 replies 0 retweets 2 likes
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