Occultation of HIP 112420 (LQ Aquarii, ZC 3339, SAO 165285) by 90 Antiope on 2011 Jul 19, pre-point times for Central Valley Univ. J2000 Dec Time Time Star RA Dec Offset Local Time Offset Star h m s mag h m o ' ArcMin h m s h m s Designation 10 25 20 6.7 22 46.2 -11 10 star 3 25 20 am 0 0 0 LQ Aqr = target 10 14 14 9.3 22 35.1 -11 14 4.5 3 14 14 am 0 11 6 10 10 20 9.7 22 31.2 -11 7 -3.0 3 10 20 am 0 15 0 10 9 12 8.7 22 30.1 -11 12 2.3 3 9 12 am 0 16 8 10 5 51 7.0 22 26.7 -11 14 3.8 3 5 51 am 0 19 29 54 Aqr = SAO 165079 10 4 45 9.7 22 25.6 -11 11 0.7 3 4 45 am 0 20 35 SAO 165064 10 4 29 9.6 22 25.3 -11 11 1.0 3 4 29 am 0 20 51 10 3 41 7.8 22 24.5 -11 9 -0.5 3 3 41 am 0 21 39 SAO 165048 10 3 17 8.6 22 24.1 -11 11 1.3 3 3 17 am 0 22 3 10 1 59 9.1 22 22.8 -11 14 4.5 3 1 59 am 0 23 21 10 0 59 9.9 22 21.8 -11 13 2.8 3 0 59 am 0 24 21 9 55 53 9.2 22 16.7 -11 12 1.8 2 55 53 am 0 29 27 9 52 22 9.5 22 13.2 -11 11 0.9 2 52 22 am 0 32 58 9 52 22 10.0 22 13.2 -11 11 0.9 2 52 22 am 0 32 58 9 43 21 9.9 22 4.1 -11 14 4.3 2 43 21 am 0 41 59 9 42 36 9.9 22 3.4 -11 10 0.3 2 42 36 am 0 42 44 9 37 21 9.1 21 58.1 -11 8 -1.7 2 37 21 am 0 47 59 9 22 51 9.1 21 43.6 -11 8 -1.4 2 22 51 am 1 2 29 9 19 6 9.2 21 39.8 -11 11 1.2 2 19 6 am 1 6 14 9 9 13 9.6 21 29.9 -11 14 4.3 2 9 13 am 1 16 7 9 6 49 8.1 21 27.5 -11 10 0.5 2 6 49 am 1 18 31 9 2 30 8.8 21 23.2 -11 13 4.1 2 2 30 am 1 22 50 8 53 24 9.0 21 14.0 -11 11 1.7 1 53 24 am 1 31 56 SAO 164236 8 44 22 9.0 21 5.0 -11 5 -3.9 1 44 22 am 1 40 58 double star 8 43 14 9.4 21 3.8 -11 10 1.2 1 43 14 am 1 42 6 SAO 164108 8 41 55 8.2 21 2.5 -11 11 1.8 1 41 55 am 1 43 25 SAO 164083 8 33 55 9.5 20 54.5 -11 12 3.5 1 33 55 am 1 51 25 8 33 6 9.7 20 53.7 -11 7 -2.3 1 33 6 am 1 52 14 8 28 15 9.9 20 48.8 -11 13 3.8 1 28 15 am 1 57 5 8 24 39 8.7 20 45.2 -11 7 -1.9 1 24 39 am 2 0 41 SAO 163850 8 16 45 9.2 20 37.3 -11 4 -4.5 1 16 45 am 2 8 35 8 9 44 8.8 20 30.2 -11 6 -2.9 1 9 44 am 2 15 36 8 8 14 8.3 20 28.7 -11 13 4.7 1 8 14 am 2 17 6 8 8 7 8.5 20 28.6 -11 5 -3.4 1 8 7 am 2 17 13 8 4 27 9.9 20 24.9 -11 12 3.6 1 4 27 am 2 20 53 8 0 58 8.9 20 21.5 -11 6 -2.1 1 0 58 am 2 24 22 7 59 31 9.2 20 20.0 -11 8 -0.4 12 59 31 am 2 25 49 SAO 163455 7 54 53 9.5 20 15.4 -11 10 1.3 12 54 53 am 2 30 27 7 52 17 8.9 20 12.7 -11 10 1.4 12 52 17 am 2 33 3 7 51 47 9.8 20 12.2 -11 12 3.9 12 51 47 am 2 33 33 7 50 44 9.3 20 11.2 -11 9 1.0 12 50 44 am 2 34 36 7 40 39 9.9 20 1.1 -11 11 2.8 12 40 39 am 2 44 41 7 24 22 8.5 19 44.7 -11 12 3.6 12 24 22 am 3 0 58 7 24 22 9.5 19 44.7 -11 12 3.6 12 24 22 am 3 0 58 7 24 6 8.8 19 44.5 -11 7 -1.2 12 24 6 am 3 1 14 7 22 45 8.7 19 43.1 -11 9 1.1 12 22 45 am 3 2 35 7 21 20 10.0 19 41.7 -11 8 -0.1 12 21 20 am 3 4 0 7 20 44 9.2 19 41.1 -11 5 -2.6 12 20 44 am 3 4 36 7 18 4 8.5 19 38.4 -11 9 1.0 12 18 4 am 3 7 16 7 17 45 9.6 19 38.1 -11 10 1.9 12 17 45 am 3 7 35 7 17 28 9.2 19 37.8 -11 10 2.3 12 17 28 am 3 7 52 7 14 30 8.7 19 34.8 -11 10 2.6 12 14 30 am 3 10 50 7 8 7 9.1 19 28.5 -11 9 1.5 12 8 7 am 3 17 13 7 6 19 9.1 19 26.6 -11 6 -1.9 12 6 19 am 3 19 1 6 53 36 7.7 19 13.9 -11 12 4.6 11 53 36 pm 3 31 44 6 48 13 9.6 19 8.5 -11 11 3.7 11 48 13 pm 3 37 7 6 42 57 7.2 19 3.2 -11 11 4.0 11 42 57 pm 3 42 23 6 42 50 8.4 19 3.1 -11 3 -4.7 11 42 50 pm 3 42 30 6 42 50 9.8 19 3.1 -11 8 0.2 11 42 50 pm 3 42 30 6 42 37 10.0 19 2.9 -11 8 1.1 11 42 37 pm 3 42 43 6 42 16 9.8 19 2.5 -11 9 1.2 11 42 16 pm 3 43 4 6 40 32 9.7 19 0.8 -11 6 -0.9 11 40 32 pm 3 44 48 6 37 20 9.9 18 57.6 -11 12 4.9 11 37 20 pm 3 48 0 6 31 30 9.8 18 51.7 -11 9 1.8 11 31 30 pm 3 53 50 6 29 47 9.9 18 50.0 -11 10 2.7 11 29 47 pm 3 55 33 6 29 15 9.5 18 49.5 -11 10 3.2 11 29 15 pm 3 56 5 6 27 45 9.2 18 48.0 -11 7 -0.2 11 27 45 pm 3 57 35 6 25 42 9.8 18 45.9 -11 7 -0.5 11 25 42 pm 3 59 38 6 25 25 9.8 18 45.6 -11 2 -4.7 11 25 25 pm 3 59 55 6 22 16 9.1 18 42.5 -11 7 -0.4 11 22 16 pm 4 3 4 6 20 12 9.9 18 40.4 -11 3 -3.6 11 20 12 pm 4 5 8 6 19 45 7.3 18 39.9 -11 6 -0.6 11 19 45 pm 4 5 35 SAO 161706 6 19 25 9.9 18 39.6 -11 11 3.6 11 19 25 pm 4 5 55 6 14 51 5.1 18 35.0 -10 59 -8.3 11 14 51 pm 4 10 29 SAO 161632 6 8 2 9.6 18 28.2 -11 5 -2.1 11 8 2 pm 4 17 18 5 55 57 7.7 18 16.1 -11 11 4.2 10 55 57 pm 4 29 23 5 19 31 9.3 17 39.6 -11 7 0.5 10 19 31 pm 5 5 49 5 18 8 5.7 17 38.2 -10 56 -10.4 10 18 8 pm 5 7 12 SAO 160708 5 14 45 5.5 17 34.8 -11 15 8.6 10 14 45 pm 5 10 35 SAO 160653 5 13 56 9.4 17 34.0 -11 2 -3.8 10 13 56 pm 5 11 24 5 9 48 7.7 17 29.8 -11 9 2.8 10 9 48 pm 5 15 32 5 1 43 8.4 17 21.7 -11 3 -2.2 10 1 43 pm 5 23 37 4 44 37 6.9 17 4.6 -11 5 -0.1 9 44 37 pm 5 40 43 SAO 160264 4 40 40 8.9 17 0.6 -11 5 -0.8 9 40 40 pm 5 44 40 4 27 3 8.7 16 46.9 -11 8 3.3 9 27 3 pm 5 58 17 4 9 58 6.9 16 29.8 -11 8 2.9 9 9 58 pm 6 15 22 SAO 159949 4 4 14 7.6 16 24.1 -11 1 -3.3 9 4 14 pm 6 21 6 4 4 7 9.5 16 24.0 -11 2 -2.8 9 4 7 pm 6 21 13 3 55 36 7.7 16 15.4 -11 3 -1.8 8 55 36 pm 6 29 44 Most of the stars above have SAO numbers, but I only give SAO numbers for the better pre-point opportunities discussed in the notes below. Many are fainter than the target star, but close to (an easy star hop from) a brighter, relatively easy-to-find star. I should modify my computer program to automatically look up the SAO numbers; if I have time (somewhat unlikely), I'll try to do that before the occultation to update this list. Notes about individual pre-point stars: (in chronological order, from earliest to latest, opposite the order of the list above) SAO 159949: This star is 1.8 deg. west-southwest of 2.5-mag. zeta Ophiuchi. Normally, it would be easy to find, but evening twilight will still be very bright for this pre-point in n. California. SAO 160264: This is very good with only a tiny offset from the target star's declination, and similar in brightness to the target, but easier to find, in a distinctive line of stars stretching due east of zeta Ophiuchi (it's about 7 deg. east of zeta). SAO 160653 and SAO 160708: These bright stars are not very close to the pre-point line of declination, but they are fairly close in time and on opposite sides of the line, so you could offset north from the first star, then just over three minutes later check that the second star is farther north by about the same amount from where you're pointing. The pair is just over 2 deg. northwest of 5th-mag. omicron Serpentis, which in turn is 2.7 deg. north and a little east of 4th-mag. xi Serpentis. SAO 161632: This bright pre-point is too far from the pre-point line for narrow fields of view, but it can be refined with the 7th- mag. pre-point with SAO 161706 only five minutes later. The star should be easy to find in a finder scope, being only 2.7 deg. south of 4th-mag. alpha Scuti. SAO 161706: See above; this small-offset pre-point opportunity occurs only 4m 54s after the bright SAO 161632 pre-point. SAO 163455: This relatively faint but good, small offset pre-point star is just 1.5 deg. north of the 4th-mag. wide double alpha Capricorni (Algedi), which in turn is 2 deg. north of 3rd-mag. beta Capricorni (Dabih). SAO 163850: This star is 1.7 deg. south and a little west of 4th- mag. epsilon Aquarii (Albali). SAO 164083: This star is 1.7 deg. west and a little north of 4th- mag. nu Aquarii, and is 0.4 deg. northwest of the Saturn Nebula. See the next one, SAO 164108 might be used to check this. SAO 164108: This pre-point is only 1m 19s after the previous pre- point, being 1.3 deg. west and a little north of nu Aquarii, and only about 15' north and a little west of the Saturn Nebula. SAO 164236: This relatively faint pre-point shouldn't be too hard to find, only 1.1 deg. east and a little north of nu Aquarii. SAO 165048 and 165064: These good pre-point opportunities, only 1m 04s apart and only about 21m before the occultation, are close to and on opposite sides of the pre-point line of declination, and are only 0.7 deg. west of the brighter pre-point opportunity with 54 Aquarii a minute later, which could serve as a good check (you would probably star hop to these stars from 54 Aquarii, anyway). 54 Aquarii = SAO 165079: This is farther from the pre-point line than the previous two, so this one is not as good for narrow-angle fields of view. The star is only 1.2 deg. west-southwest of 4 1/2- mag. sigma Aquarii. David Dunham, dunham@starpower.net