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Strange double Iridium flare?
Some members of my astronomy club and I witnessed Iridium 7 flaring on Saturday, June 15, at 11:02 PM CDT, from Lincoln, Nebraska. This was a predicted flare on heavens-above.com. But the weird thing was, it was trailed by what seemed to be a second Iridium satellite, in the same trajectory, separated by not more than 2 or 3 degrees from the first one. The second satellite flared to about the same brightness as the first (about mag -6), but a few seconds later.
The "mystery" satellite showed all the characteristics of an Iridium flare, but it was not listed on heavens-above. (Come to think of it, it's possible that the trailing one was Iridium 7 and the leading one was the "mystery" satellite. That's how close together they were.)
Does anybody know whether Iridium 7 is temporarily traveling in tandem with another Iridium?