------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 2746 2011 Jun 25 10.20UT Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074 INTERNET: GUY@TAHQ.DEMON.CO.UK Backup: gmh@wdcc1.bnsc.rl.ac.uk WORLD WIDE WEB http://www.theastronomer.org ------------------------------------------------------------------- 2011 MD M. Blythe et. Al., (station 704) Lincoln Laboratory ETS, New Mexico report on MPEC 2011-M23 their discovery of a near earth object on June 22 at magnitude 18.9. 2011 06 22.26489 16 52 05.99 +40 34 17.5 18.9 cEM023704 2011 06 22.27521 16 51 58.24 +40 33 54.6 19.2 cEM023704 2011 06 22.29608 16 51 42.63 +40 32 58.8 19.4 cEM023704 Amongst others Peter Birtwhistle, Great Shefford (station J95) confirmed the object using a 0.40-m f/6.0 Schmidt-Cassegrain telescope: 2011 06 23.07075 16 49 19.28 +39 58 56.4 uEM023J95 2011 06 23.07233 16 49 18.43 +39 58 48.3 uEM023J95 Orbital elements: Epoch 2011 Aug. 27.0 TT = JDT 2455800.5 MPC M 51.54504 (2000.0) P Q n 0.90091518 Peri. 6.12962 +0.15113548 +0.98754135 a 1.0617284 Node 272.56906 -0.90879587 +0.12137078 e 0.0431456 Incl. 2.51400 -0.38890632 +0.10015593 P 1.09 H 27.7 G 0.15 U 3 Peter Birtwhistle mentions that 2011 MD will make a VERY close approach to Earth on June 27 to within 1 Earth diameter at current prediction. Ephemeris: Date TT R. A. (2000) Decl. Delta r Elong. V 2011 06 27.00 16 03 25.0 +27 29 10 0.0010831.0171 119.3 15.1 2011 06 27.05 16 00 14.1 +26 26 25 0.0010071.0171 119.6 14.9 2011 06 27.10 15 56 36.1 +25 13 00 0.0009291.0170 120.1 14.7 2011 06 27.15 15 52 23.6 +23 45 38 0.0008501.0170 120.5 14.5 2011 06 27.20 15 47 25.7 +21 59 27 0.0007691.0170 121.1 14.3 2011 06 27.25 15 41 26.2 +19 46 54 0.0006851.0169 121.7 14.0 2011 06 27.30 15 33 58.3 +16 55 28 0.0005981.0169 122.4 13.7 2011 06 27.35 15 24 15.0 +13 02 42 0.0005081.0169 123.2 13.3 2011 06 27.40 15 10 41.5 +07 23 40 0.0004131.0168 123.9 12.9 2011 06 27.45 14 49 22.7 -01 47 17 0.0003141.0168 124.0 12.3 2011 06 27.50 14 05 57.4 -19 38 26 0.0002121.0167 120.5 11.5 2011 06 27.55 10 38 36.4 -57 13 48 0.0001291.0166 96.5 11.2 2011 06 27.60 03 44 48.2 -21 01 03 0.0001581.0165 58.9 13.7 2011 06 27.65 02 33 22.2 +08 40 08 0.0002561.0165 56.9 14.9 2011 06 27.70 02 00 58.3 +21 30 35 0.0003581.0164 60.3 15.3 2011 06 27.75 01 40 19.8 +28 33 29 0.0004551.0164 63.1 15.6 2011 06 27.80 01 25 20.1 +33 03 02 0.0005471.0164 65.3 15.9 2011 06 27.85 01 13 39.6 +36 11 21 0.0006361.0164 67.0 16.1 2011 06 27.90 01 04 10.1 +38 31 13 0.0007221.0163 68.4 16.3 2011 06 27.95 00 56 13.3 +40 19 41 0.0008041.0163 69.5 16.5 2011 06 28.00 00 49 25.3 +41 46 35 0.0008851.0163 70.4 16.6 Guy M Hurst