2005 FN: Practice at tracking incoming objects
Confirmation by the Mt. Lemmon Survey
Here you see 2005 FN caught during the discovery confirmation process by Ed Beshore early on March 18th UT at the Mt. Lemmon Survey 1.5m telescope, which is just north of Tucson, Arizona and is part of the nearby Catalina Sky Survey (CSS). He writes: "Both the Mt. Lemmon Survey and Catalina Sky Survey telescopes were able to report multiple observations of this object, despite intermittent clouds. Images attached were over about 15 minutes, with 10 second exposures." Shown half-size; click on the image to see it full size.
17 1034:04 – LINEAR in New Mexico makes the discovery (March 17.44032), 3:34am MST 17 1135:23 – last of 5 detections spanning just over an hour; now 4:35am MST at the telescope, 6:35am at Lincoln Lab & the MPC, both in Massachusetts 17 2122 – AT72198 posted to the MPC NEOCP (Mar. 17.89) 17 2318:53 – Reiner Stoss sends a message to the MPML noting AT72198's importance 18 0044:34 – Tim Spahr at MPC confirms to the MPML that this object will be interesting, and reports "Impact is ruled out" 18 0442 – A/CC posts its first report, following delayed receipt of a "heads-up" 18 0541:05 – Mt. Lemmon Survey (MLS, part of CSS) in Arizona picks up AT72198 at 10:41pm MST, 4 positions are reported over 13 mins., until 0554:33 18 0555:46 – Catalina Sky Survey (CSS) in Arizona begins 2.28-hour run (see 0812:36) 18 0630:25 – MLS begins 4.37-hour run with some interruptions, see 1052:28 18 0707:34 – Sandlot Observatory in Kansas reports the first of 3 positions (a "triple"), with the last position at 0711:48 18 0737:53 – Jeffrey Sue/H06* starts triplet, last at 0744:08 18 0754:01 – McCarthy Observatory in Connecticut begins triple, last at 0817:01 18 0805:08 – Andrew Lowe/H06* begins a 29-minute run, reporting 10 positions (animation) 18 0812:36 – CSS run ends with 88 positions reported, about 1 every 1.6 mins. 18 0818:45 – Sandlot starts another triple, last at 0833:05 18 0900:38 – Sandlot starts one more triple, last at 0915:02 18 1052:28 – MLS run ends at 3:52am MST with 60 positions gathered 18 1129:41 – J. Sue/H06* starts second triplet, last at 1136:33 (4:36am MST) (animation) 18 1152 – MPEC 2005-F24 issued announcing the discovery of 2005 FN 18 2143 – 2005 FN passes Earth at about 0.35 lunar distance at 2:43pm MST *H06 = New Mexico Skies, here Rent-A-Scope users, with Jeffrey Sue's observations reported in the Daily Orbit Update (DOU) MPEC of March 19th, and Andrew Lowe's published in the DOU of the 20th.
Looking down on the Earth-Moon system, with the Sun to the right, gray shadow cones extending away from Moon and Earth, and 2005 FN moving from left to right.
Looking at the Earth-Moon system from the direction of the Sun, with 2005 FN moving from lower left to upper right.
25 March: Link to Jeffrey Sue's 2005 FN animation added in Time Line section.
23 March: Link to further news added to News links section.
21 March: Link to Andrew Lowe's 2005 FN animation added in Time Line section.
20 March: Time Line corrected to show that Reiner Stoss sent his message an hour earlier (00:18 local).
19 March: Updated twice, first with a correction and an addition to the Penumbral passages? section, and then with additions to the Time Line section.
18 March: This page first posted late in the day (0530 UTC on the 19th).