MAY 2017 OBSERVING Lunar Almanac Northern Hemisphere Sky Chart North _ D G V oub al Op aarbia les ayxy Di nen lbeles tSatra G ff c r Pl lob use lCulsu tsatrar an ul t s e e n t re be et ar Cl ublua r ar l y Ne utsetre a bu r la ` b Fa ¡ c CEPHE + n ci US _ _ a ` ¡ g C N o Cr rth os er s n Y b r U 7 URSA MINOR N S ITT A LA _ M92 d d M51 ¡ A b _ BO _ S ¡ ÖT ES Arc turu s M5 S EN ) RP UT SE AP (C b S M A Y 2 0 1 7 * SK Y & TELESCOPE CEN IU May 18 Go out within an hour of a time listed to the right. Turn the map around so the yellow label for the direction you're facing is at the bottom. That's the horizon. The center of the map is overhead. Ignore the parts of the map above horizons you're not facing. P * Montes Cordillera USING THE NORTHERN HEMISPHERE MAP R May 11 16h O * Boussingault Crater SE C May 4 Planet location shown for mid-month / S * Mare Smythii / May 1 s re * Gauss Crater g ta FAVORABLE LIBRATIONS n ci Fa 4 _ a 2 3 Spica _ b 1 ` Moon May 10 ` Diameter 33′ 27″ ¡ 4 357,210 km 0 An May 26, 01h UT _ M Perigee _ ` _ A -1 _ May 12, 20h UT Diameter 29′ 25″ ` VIRGO b BR a Apogee 406,209 km M3 0° LI US d DISTANCES 42 M12 May 25 19:44 UT c May 19 00:33 UT CH NEW MOON HIU LAST QUARTER OP 21:42 UT M10 02:47 UT ` May 10 a May 3 Zenith ` _ IC4665 70 FULL MOON S PEN SER ) UDA (CA FIRST QUARTER c / + h 19 Facing East AQUIL Mizar & Alcor 31 +60° 30 n 29 r 28 a ub 27 a 26 ` 25 d 24 a 23 Th 22 ` 21 O 20 AC 19 DR 18 a 17 ` 16 M13 15 CORONA BOREALIS 14 c 13 HERCU LE 12 R 11 Ve ga 10 _ 9 L 8 ¡ 7 S AT YR 6 FRI A 5 M5 7 4 re o THU 3 Al bi WED EC U TUE 2 LP G MON 1 SUN VU SA MOON PHASES Little Dipper 11 ` M2 G N ASA / LRO M52 De ne b M 29 18 Yellow dots indicate which part of the Moon's limb is tipped the most toward Earth by libration. a M 39 g NE 4 SIOPEIA 22 h May 1 LU PU TA U e S RUS f -40° 13 Facing