Vi följde asteroiden ändra fram till klockan 23:00, då hade dess ljusstyrka avtagit ganska markant. I bilden nedan med 28 minuters exponering, ser man hur asteroidens ljusstyrka minskar från klockan 22:03 (då den befanns sig vid galaxen M106) och fram till klockan 22:31.
Ett kul sammanträffande var att då asteroiden passerade M106, hade den ungefär samma ljusstyrka som galaxen M106 (magnitude 9,2 för DA14 och 9,5 för M106). Men, skillnaden var desto större i avstånd, 2012DA14 befann sig på ett avstånd av ca 48 000 km, medan M106 ligger ca 25 miljoner ljusår bort.
Earlier tonight we finally got to see the so much talked about asteroid 2012 DA14. Me and two friends went west of Östersund to find a clear sky. We had a fantastic night with clear and fine weather and no wind. Shortly before 21:00, we managed to see the asteroid in the 15x70 binoculars I had. It was difficult to find in the thin lighted haze that were in the horizon, but its rapid movement made easy to spot among the surrounding stars.
We followed the asteroid to 23:00, then its brightness had diminished quite significantly. In the picture below, with 28 minutes of exposure, you can see how the asteroid brightness decreases from 22:03 o'clock (when it was found at the galaxy M106) and until 22:31 o'clock.
A nice coincidence was that when the asteroid passed M106, it had about the same brightness as the galaxy M106 (magnitude 9.2 for DA14 and 9.5 for M106). However, the difference in distance was quite impressive, 2012DA14 was at a distance of about 48,000 km, while the M106 is located about 25 million light years away.
|On the lookout for 2012DA14|
|1 minut exposure|
|5 minute exposure|
|28 minute exposure|