Monthly Observing Information
This page provides charts, and text concerning what is visible in the night sky during the month noted. All information is for Baton Rouge, Louisiana, but they can still provide useful information for most other areas of the U.S.A. Sky charts, Saturn ring plane, and Venus phase images are for Midnight, on the 15th day of the month. Sky charts are 100 degree field of view, and show objects down to 12th magnitude. Times in the Astronomy Lab 2 text information are in 24 hour format and have been adjusted for Daylight Savings Time. Subtract 12 hours from those over 12 to get the equivalent PM. RA and DEC given are for Epoch 2000.
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Baton Rouge Clear Sky Clock
Click on image for more info and details. This clock is for the Baton Rouge area only.
May
Moon Calendar
Sky charts
Saturn’s Ring Plane
Venus Phase
Sun and Moon Rise and Set
Begin End Date Moonrise Moonset Sunrise Sunset Twilight Twilight ------------ --------- --------- --------- --------- --------- --------- 5/1/2021 00:07 10:20 06:21 19:43 04:53 21:11 5/2/2021 01:07 11:24 06:20 19:44 04:52 21:12 5/3/2021 01:57 12:27 06:19 19:45 04:51 21:13 5/4/2021 02:40 13:30 06:18 19:45 04:50 21:14 5/5/2021 03:17 14:28 06:17 19:46 04:49 21:15 5/6/2021 03:49 15:25 06:16 19:47 04:48 21:16 5/7/2021 04:19 16:19 06:16 19:47 04:47 21:17 5/8/2021 04:47 17:14 06:15 19:48 04:46 21:18 5/9/2021 05:15 18:07 06:14 19:49 04:45 21:19 5/10/2021 05:43 19:01 06:13 19:49 04:44 21:19 5/11/2021 06:13 19:55 06:13 19:50 04:43 21:20 5/12/2021 06:47 20:51 06:12 19:51 04:42 21:21 5/13/2021 07:24 21:46 06:11 19:51 04:41 21:22 5/14/2021 08:06 22:41 06:11 19:52 04:40 21:23 5/15/2021 08:53 23:33 06:10 19:52 04:39 21:24 5/16/2021 09:46 ------ 06:09 19:53 04:38 21:25 5/17/2021 10:42 00:22 06:09 19:54 04:37 21:26 5/18/2021 11:42 01:06 06:08 19:54 04:36 21:27 5/19/2021 12:42 01:47 06:08 19:55 04:35 21:28 5/20/2021 13:45 02:24 06:07 19:56 04:35 21:29 5/21/2021 14:48 02:59 06:07 19:56 04:34 21:30 5/22/2021 15:53 03:33 06:06 19:57 04:33 21:30 5/23/2021 17:00 04:07 06:06 19:57 04:32 21:31 5/24/2021 18:10 04:44 06:05 19:58 04:32 21:32 5/25/2021 19:23 05:24 06:05 19:59 04:31 21:33 5/26/2021 20:36 06:10 06:05 19:59 04:30 21:34 5/27/2021 21:47 07:03 06:04 20:00 04:30 21:35 5/28/2021 22:52 08:02 06:04 20:00 04:29 21:35 5/29/2021 23:49 09:07 06:04 20:01 04:29 21:36 5/30/2021 ------ 10:13 06:03 20:01 04:28 21:37 5/31/2021 00:36 11:18 06:03 20:02 04:28 21:38 '------' means the event does not occur on this date. Object Right ascensio Declination Azimuth Altitude Earth distance Sun distance ------------ -------------- ------------- ------------- ------------- --------------- --------------- Sun 03h 28m 56.3s +18° 54' 54" 341° 26' 11" -38° 29' 40" 0 0 Mercury 04h 59m 32.6s +25° 08' 50" 322° 37' 14" -23° 35' 32" 131,114,854 57,084,338 Venus 04h 22m 45.4s +21° 47' 18" 328° 39' 09" -30° 55' 16" 249,627,165 107,698,621 Mars 06h 58m 02.5s +24° 11' 09" 302° 08' 37" -05° 19' 11" 318,951,264 246,684,206 Jupiter 22h 10m 02.6s -12° 10' 22" 87° 55' 50" -28° 03' 10" 755,314,059 755,852,360 Saturn 21h 04m 27.0s -17° 22' 02" 100° 50' 20" -16° 23' 08" 1,454,062,353 1,490,676,360 Uranus 02h 36m 48.1s +14° 53' 54" 356° 57' 45" -44° 36' 02" 3,102,317,543 2,955,219,581 Neptune 23h 35m 04.3s -03° 53' 18" 65° 34' 28" -41° 24' 22" 4,545,978,068 4,476,646,981 Pluto 19h 56m 16.1s -22° 13' 51" 113° 04' 27" -04° 42' 37" 5,055,970,839 5,128,380,841 Moon 06h 04m 50.7s +24° 43' 09" 310° 29' 35" -14° 13' 05" 402,739 0 Object Rise: Tran Set: Phase Constl Magnitud ------------ ----- ----- ----- ------- --------- -------- Sun 05:11 12:01 18:52 0.00% Tau unknown Mercury 06:24 13:31 20:39 41.93% Tau 0.2 Venus 05:57 12:54 19:52 97.47% Tau -3.9 Mars 08:27 15:31 22:34 94.39% Gem 1.6 Jupiter 01:12 06:45 12:17 99.00% Aqr -2.4 Saturn 00:20 05:39 10:59 99.75% Cap 0.6 Uranus 04:33 11:11 17:49 100.00% Ari 5.9 Neptune 02:17 08:10 14:02 99.98% Aqr 7.9 Pluto 23:20 04:30 09:36 99.98% Sgr 14.3 Moon 07:06 14:21 21:38 10.20% Gem unknown Moon Data --------- Distance (km): 402,738.9 Distance (miles): 250,251.0 True Equatorial: 06h 07m 39.5s +25° 19' 31" Angular diameter: 0° 29' 33" Total libration (l,b): 4° 35' 55" , 2° 23' 18" Optical libration: 4° 33' 59" , 2° 25' 23" Physical libration: 0° 01' 56" , 0° 02' 05" Position Angle: 2° 13' 35" Pos. angle (bright limb): 142° 44' 26" Phase angle: 2° 13' 35" Age: 3.42 Mars Data --------- Declination of earth: 7° 35' 52" Declination of Sun: 17° 37' 07" Longitude of the central Meridian: 22° 24' 37" Pos. Angle: 340° 30' 12" Jupiter Data ----------------- Declination of earth: 0° 29' 37" Declination of Sun: 0° 03' 39" Longitude of the central Meridian:123° 21' 27" Pos. Angle: 337° 08' 08" Saturn Data --------- Declination of earth: 16° 45' 19" Declination of Sun: 18° 55' 47" Longitude of the central Meridian: 0° 00' 00" Pos. Angle: 6° 39' 43" Name Month/Day RA Decl Hourly Rate ----------------------------- ------------ ---------- ---------- ----------- Phi Bootids 05/01 16.0 51.0 6 Alpha Scorpiids 05/03 16.0 -22.0 6 Eta Aquarids 05/03 22.4 -1.9 60
Information for this section is from TheSkyX Student Edition
Lunar Eclipse Report for 2021
Lunar eclipse on 5/26/2021
Moon rise: 20:37
Moon set: 6:10
Magnitude: 1.01
Partial phase begins: 4:49
Total phase begins: 6:14
Time of maximum eclipse: 6:22
Total phase ends: 6:30
Partial phase ends: 7:55
Planet View Info Report for 5/ 1/2021 to 5/31/2021
Mercury
Date Rise Set RA Dec Elongation Ill Fr DIST(AU)
5/ 1/2021 7:02 20:53 3h25m32s 20°14'47" 13°22'39" 0.833 1.18815
5/ 8/2021 7:16 21:25 4h17m16s 23°39'51" 19°05'33" 0.624 1.03803
5/15/2021 7:25 21:40 4h58m32s 25°07'58" 21°50'21" 0.425 0.88090
5/22/2021 7:24 21:36 5h25m47s 25°01'11" 21°11'11" 0.258 0.74139
5/29/2021 7:10 21:13 5h36m44s 23°45'27" 16°49'25" 0.123 0.63318
Venus
Date Rise Set RA Dec Elongation Ill Fr DIST(AU)
5/ 1/2021 6:54 20:26 3h10m50s 17°25'14" 9°12'51" 0.987 1.69780
5/ 8/2021 6:55 20:40 3h45m49s 19°47'52" 11°02'32" 0.982 1.68488
5/15/2021 6:58 20:54 4h21m43s 21°44'29" 12°53'03" 0.975 1.66916
5/22/2021 7:03 21:07 4h58m23s 23°11'29" 14°44'14" 0.967 1.65059
5/29/2021 7:10 21:19 5h35m37s 24°05'58" 16°35'47" 0.958 1.62925
Mars
Date Rise Set RA Dec Elongation Ill Fr DIST(AU)
5/ 1/2021 9:41 23:53 6h20m06s 24°48'19" 53°43'34" 0.934 2.02086
5/ 8/2021 9:33 23:43 6h38m49s 24°34'21" 51°12'13" 0.939 2.07676
5/15/2021 9:26 23:33 6h57m31s 24°12'00" 48°42'46" 0.944 2.13055
5/22/2021 9:18 23:22 7h16m07s 23°41'26" 46°15'14" 0.948 2.18204
5/29/2021 9:11 23:11 7h34m35s 23°02'52" 43°49'22" 0.953 2.23118
Jupiter
Date Rise Set RA Dec Elongation Ill Fr DIST(AU)
5/ 1/2021 2:58 14:01 22h03m00s -12°45'25" 72°31'43" 0.991 5.26801
5/ 8/2021 2:33 13:37 22h06m38s -12°27'15" 78°22'28" 0.990 5.16130
5/15/2021 2:08 13:14 22h09m50s -12°11'29" 84°19'03" 0.990 5.05235
5/22/2021 1:43 12:49 22h12m32s -11°58'20" 90°21'52" 0.990 4.94236
5/29/2021 1:17 12:24 22h14m43s -11°48'02" 96°31'30" 0.990 4.83256
Saturn
Date Rise Set RA Dec Elongation Ill Fr DIST(AU)
5/ 1/2021 2:10 12:49 21h03m03s -17°26'03" 87°43'42" 0.997 9.97410
5/ 8/2021 1:43 12:22 21h03m56s -17°23'17" 94°17'51" 0.997 9.85734
5/15/2021 1:16 11:55 21h04m30s -17°21'52" 100°55'32" 0.998 9.74155
5/22/2021 0:49 11:28 21h04m45s -17°21'50" 107°36'38" 0.998 9.62839
5/29/2021 0:21 11:00 21h04m41s -17°23'10" 114°21'16" 0.998 9.51940
Uranus
Date Rise Set RA Dec Elongation Ill Fr DIST(AU)
5/ 1/2021 6:22 19:36 2h33m35s 14°38'41" 0°26'05" 1.000 20.76568
5/ 8/2021 5:56 19:10 2h35m10s 14°46'15" 6°33'13" 1.000 20.75961
5/15/2021 5:29 18:45 2h36m44s 14°53'40" 12°54'46" 1.000 20.74033
5/22/2021 5:03 18:19 2h38m17s 15°00'55" 19°15'41" 1.000 20.70816
5/29/2021 4:37 17:53 2h39m47s 15°07'53" 25°36'08" 1.000 20.66358
Neptune
Date Rise Set RA Dec Elongation Ill Fr DIST(AU)
5/ 1/2021 4:07 15:52 23h33m48s -4°00'58" 48°27'38" 1.000 30.58368
5/ 8/2021 3:40 15:25 23h34m29s -3°56'51" 55°03'37" 1.000 30.49153
5/15/2021 3:13 14:58 23h35m05s -3°53'14" 61°39'39" 1.000 30.39143
5/22/2021 2:46 14:31 23h35m36s -3°50'11" 68°15'43" 1.000 30.28481
5/29/2021 2:19 14:04 23h36m03s -3°47'42" 74°51'59" 1.000 30.17316
Pluto
Date Rise Set RA Dec Elongation Ill Fr DIST(AU)
5/ 1/2021 1:16 11:29 19h56m32s -22°11'16" 104°02'38" 1.000 34.01324
5/ 8/2021 0:49 11:02 19h56m28s -22°12'26" 110°50'56" 1.000 33.90412
5/15/2021 0:21 10:34 19h56m17s -22°13'51" 117°39'22" 1.000 33.80004
5/22/2021 23:49 10:06 19h56m01s -22°15'31" 124°27'44" 1.000 33.70263
5/29/2021 23:22 9:38 19h55m39s -22°17'23" 131°16'02" 1.000 33.61328
Planet Data Report
Planet Mean Dist Period of Inclination Equatorial
From Sun Revolution Diameter
(AU) (km)
Mercury 0.39 88 days 7° 4880
Venus 0.72 224.7 days 3.4° 12100
Earth 1.00 365.24 days 0° 12756
Mars 1.52 687 days 1.9° 6794
Jupiter 5.20 11.86 years 1.3° 143200
Saturn 9.54 29.46 years 2.5° 120000
Uranus 19.18 84 years 0.8° 52290
Neptune 30.06 165 years 1.8° 50450
Pluto 39.44 248 years 17.2° 2200-2300
Moon Apsides Report for 5/ 1/2021 to 5/31/2021
Date Hour Apsis Distance (km) Diameter
5/11/2021 17 Apogee 406507 0.4899°
5/25/2021 21 Perigee 357322 0.5574°
Moon Nodes Report for 5/ 1/2021 to 5/31/2021
Date Time Node Illuminated Fraction
5/13/2021 5:28 Ascending 0.02
5/26/2021 14:37 Descending 1.00
Meteor Showers Report for 5/ 1/2021 to 5/31/2021
Date Meteor Shower ZHR RA DEC Illum. Frac. Longitude
5/ 5/2021 eta-Aquarids 35 22h20m -1° 0.30 45°
5/12/2021 alpha-Scorpiids 5 16h04m -24° 0.01 52°
Twilight Report for 5/ 1/2021 to 5/31/2021
Date Sun Astronomical Nautical Civil
Rise Set Begin End Begin End Begin End
5/ 1/2021 6:21 19:43 4:50 21:14 5:21 20:43 5:51 20:13
5/ 8/2021 6:15 19:48 4:42 21:21 5:14 20:49 5:45 20:18
5/15/2021 6:10 19:52 4:35 21:28 5:08 20:54 5:40 20:23
5/22/2021 6:06 19:57 4:29 21:34 5:03 21:00 5:36 20:28
5/29/2021 6:04 20:01 4:25 21:40 5:00 21:05 5:33 20:32
Information for this section is from Astronomy Lab 2.03
