Calendar of Astronomical Events

Astronomical Calendar for 2011

January
1	Lunar occultation of Delta Scorpii
2	Conjunction of Jupiter and Uranus Conjunction of the Moon and Mercury
3	The Earth at perihelion
4	Quadrantid meteor shower 2011 Partial solar eclipse New Moon Mercury at dichotomy The Moon at perihelion Close approach of Jupiter and Uranus
7	Supernova SN2011B discovered Mars at apogee
8	Venus at dichotomy Venus at greatest elongation west
5	Mercury at highest altitude in morning sky
9	Mercury at greatest elongation west
10	The Moon at apogee Close approach of the Moon, Jupiter and Uranus Conjunction of the Moon and Jupiter
12	Moon at First Quarter
15	Close approach of the Moon and M45
17	Conjunction of Mercury and Pluto
19	γ-Ursae Minorid meteor shower 2011 Full Moon
20	The Moon at aphelion
21	The Moon at perigee
23	Asteroid 7 Iris at opposition
24	Asteroid 23 Thalia at opposition
25	January Naked Astronomy podcast released Conjunction of the Moon and Saturn
26	Saturn enters retrograde motion Moon at Last Quarter
28	Lunar occultation of Delta Scorpii
29	Conjunction of the Moon and Venus Close approach of the Moon and Venus
30	1 Ceres at solar conjunction
31	Mercury at aphelion

February
1	Conjunction of the Moon and Mercury The Moon at perihelion
2	New Moon
4	Mars at solar conjunction
6	Supernova SN2011aa discovered The Moon at apogee Close approach of the Moon and Jupiter
7	Conjunction of the Moon and Jupiter Asteroid 44 Nysa at opposition
8	α-Centaurid meteor shower 2011
9	Conjunction of Venus and Pluto
11	Moon at First Quarter Close approach of the Moon and M45
17	Neptune at solar conjunction
18	Full Moon
19	The Moon at perigee The Moon at aphelion
21	Conjunction of the Moon and Saturn
24	Supernova SN2011fh discovered Lunar occultation of Delta Scorpii Moon at Last Quarter
25	February Naked Astronomy podcast released Mercury at superior solar conjunction
28	Close approach of the Moon and Venus Conjunction of the Moon and Venus

March
2	The Moon at perihelion
3	Supernova SN2011ao discovered
4	New Moon
6	The Moon at apogee
7	Conjunction of the Moon and Jupiter
9	Mars at perihelion
12	Asteroid 3 Juno at opposition Moon at First Quarter
13	Asteroid 20 Massalia at opposition
14	Conjunction of Neptune and Ceres
15	γ-Normid meteor shower 2011 Jupiter at perihelion
16	Mercury at perihelion Conjunction of Jupiter and Mercury
17	136472 Makemake at opposition
18	MESSENGER arrives in Mercury orbit
19	Full Moon The Moon at perigee
20	March equinox Conjunction of the Moon and Saturn
21	Mercury at dichotomy Uranus at solar conjunction The Moon at aphelion
22	Mercury at greatest elongation east
23	Mercury at highest altitude in evening sky Lunar occultation of Delta Scorpii
25	March Naked Astronomy podcast released
26	Supernova SN2011ed discovered Moon at Last Quarter Conjunction of Venus and Neptune Close approach of Venus and Neptune
31	The Moon at perihelion Conjunction of the Moon and Venus

April
1	Supernova SN2011bc discovered Conjunction of Venus and Ceres
2	The Moon at apogee
3	New Moon Conjunction of Mars and Uranus Saturn at opposition
6	Jupiter at solar conjunction
7	136108 Haumea at opposition Jupiter at apogee
9	Mercury at inferior solar conjunction
11	Moon at First Quarter 136199 Eris at solar conjunction
17	The Moon at perigee Conjunction of the Moon and Saturn Full Moon
18	Venus at aphelion
19	Conjunction of Mars and Mercury
20	Lunar occultation of Delta Scorpii The Moon at aphelion
22	April Naked Astronomy podcast released Conjunction of Venus and Uranus Lyrid meteor shower 2011
24	π-Puppid meteor shower 2011 Moon at Last Quarter
26	Supernova SN2011by discovered
29	Mercury at aphelion The Moon at apogee
30	The Moon at perihelion Conjunction of the Moon and Venus

May
1	Conjunction of the Moon and Mercury Conjunction of Jupiter and Mars Conjunction of the Moon and Jupiter Conjunction of the Moon and Mars
3	New Moon
6	η-Aquariid meteor shower 2011
7	Mercury at greatest elongation west
11	Mercury at highest altitude in morning sky
8	Close approach of Venus and Mercury
9	η-Lyrid meteor shower 2011
10	Moon at First Quarter Conjunction of Jupiter and Mercury
11	Conjunction of Venus and Jupiter Close approach of Venus and Jupiter Close approach of Venus, Jupiter and Mercury
12	Mercury at dichotomy
13	Supernova SN2011di discovered
14	Asteroid 10 Hygiea at opposition Conjunction of the Moon and Saturn
15	Supernova SN2011dq discovered The Moon at perigee
17	Full Moon Lunar occultation of Delta Scorpii
18	Close approach of Venus and Mercury
19	The Moon at aphelion Conjunction of Mercury and Mars
22	Conjunction of Venus and Mars
23	Close approach of Venus and Mars
24	Moon at Last Quarter
25	May Naked Astronomy podcast released
27	The Moon at apogee
29	Conjunction of the Moon and Jupiter
30	Conjunction of the Moon and Mars The Moon at perihelion
31	Conjunction of the Moon and Venus Conjunction of the Moon and Mercury

June
1	Supernova SN2011dh discovered New Moon Partial solar eclipse
3	Neptune enters retrograde motion
4	1 Ceres at aphelion
5	How sunspots keep warm
8	Moon at First Quarter
10	Conjunction of the Moon and Saturn
11	Daytime Arietid meteor shower 2011 The Moon at perigee
12	Mercury at perihelion Mercury at superior solar conjunction
13	Saturn ends retrograde motion
14	Lunar occultation of Delta Scorpii
15	Total lunar eclipse Full Moon
16	The Moon at aphelion
21	June solstice
23	Moon at Last Quarter
24	The Moon at apogee
25	June Naked Astronomy podcast released
26	Supernova SN2011dz discovered Close approach of the Moon and Jupiter Conjunction of the Moon and Jupiter Asteroid 43 Ariadne at opposition
27	June Bootid meteor shower 2011
28	134340 Pluto at opposition Close approach of the Moon and Mars Conjunction of the Moon and Mars
30	Conjunction of the Moon and Venus Close approach of the Moon and Venus Lunar occultation of Venus The Moon at perihelion

July
1	Partial solar eclipse New Moon
2	Asteroid 21 Lutetia at opposition Conjunction of the Moon and Mercury
4	The Earth at aphelion
7	The Moon at perigee Conjunction of the Moon and Saturn
8	Moon at First Quarter
9	Uranus enters retrograde motion
11	Lunar occultation of Delta Scorpii
14	The Moon at aphelion
15	Full Moon
16	Mercury at dichotomy
20	Supernova SN2011eh discovered
10	Mercury at highest altitude in evening sky
19	Mercury at greatest elongation east
21	The Moon at apogee
23	Supernova PTF11iqb discovered Moon at Last Quarter Close approach of the Moon and Jupiter Conjunction of the Moon and Jupiter
25	July Naked Astronomy podcast released
26	Mercury at aphelion Asteroid 9 Metis at opposition
27	Close approach of the Moon and Mars Lunar occultation of Mars Conjunction of the Moon and Mars
29	Piscis Austrinid meteor shower 2011
30	Southern δ-Aquariid meteor shower 2011 α-Capricornid meteor shower 2011 New Moon
31	Asteroid 2 Pallas at opposition The Moon at perihelion

August
1	Conjunction of the Moon and Mercury
2	The Moon at perigee
3	Asteroid 4 Vesta at opposition
4	Supernova SN2011ek discovered Conjunction of the Moon and Saturn
6	Moon at First Quarter
7	Did the Earth once have a second moon? Lunar occultation of Delta Scorpii
9	Venus at perihelion
12	The Moon at aphelion
13	Perseid meteor shower 2011 Full Moon
16	Venus at superior solar conjunction Mercury at inferior solar conjunction
18	κ-Cygnid meteor shower 2011 The Moon at apogee
19	Comet 45P/Honda-Mrkos-Pajdusakova passes perihelion
20	Close approach of the Moon and Jupiter Conjunction of the Moon and Jupiter
21	Moon at Last Quarter
22	Neptune at opposition
25	Close approach of the Moon and Mars Conjunction of the Moon and Mars
27	Conjunction of the Moon and Mercury
28	New Moon
30	Jupiter enters retrograde motion The Moon at perigee The Moon at perihelion
31	Conjunction of the Moon and Saturn

September
1	Asteroid 192 Nausikaa at opposition Aurigid meteor shower 2011
3	Mercury at greatest elongation west
4	Mercury at highest altitude in morning sky
3	Lunar occultation of Delta Scorpii
4	Mercury at dichotomy Moon at First Quarter
8	Mercury at perihelion
9	September ε-Perseid meteor shower 2011 The Moon at aphelion
12	Full Moon
15	The Moon at apogee 1 Ceres at opposition
16	Close approach of the Moon and Jupiter Conjunction of the Moon and Jupiter
20	Moon at Last Quarter 136472 Makemake at solar conjunction
23	Close approach of the Moon and Mars Conjunction of the Moon and Mars September equinox
25	September Naked Astronomy podcast released Uranus at opposition
27	New Moon Daytime Sextantid meteor shower 2011 The Moon at perigee
28	Conjunction of the Moon and Saturn Mercury at superior solar conjunction
29	Supernova SN2011ht discovered The Moon at perihelion

October
1	Lunar occultation of Delta Scorpii Close approach of Mars and M44
2	MESSENGER's first 90 days orbiting Mercury
3	Moon at First Quarter
5	Asteroid 27 Euterpe at opposition
6	October Camelopardalid meteor shower 2011
8	The Moon at aphelion
9	Draconid meteor shower 2011
10	Southern Taurid meteor shower 2011
11	136108 Haumea at solar conjunction δ-Aurigid meteor shower 2011 Full Moon
12	The Moon at apogee
13	Close approach of the Moon and Jupiter Conjunction of the Moon and Jupiter Saturn at solar conjunction
15	136199 Eris at opposition
18	ε-Geminid meteor shower 2011
19	Supernova SN2011gv discovered Moon at Last Quarter
21	Orionid meteor shower 2011 Conjunction of the Moon and Mars
22	Mercury at aphelion
23	A vast water reservoir is found in a forming planetary system
24	Leonis Minorid meteor shower 2011
25	October Naked Astronomy podcast released
26	The Moon at perigee New Moon
27	Jupiter at perigee Close approach of the Moon and Mercury Lunar occultation of Mercury Conjunction of the Moon and Mercury
28	Conjunction of the Moon and Venus The Moon at perihelion Jupiter at opposition
31	Asteroid 1036 Ganymed at opposition

November
2	Moon at First Quarter
5	Asteroid 29 Amphitrite at opposition
8	Supernova SN2011hr discovered The Moon at aphelion The Moon at apogee
9	Close approach of the Moon and Jupiter Neptune ends retrograde motion Conjunction of the Moon and Jupiter
10	Full Moon
11	Asteroid 40 Harmonia at opposition Asteroid 68 Leto at opposition
12	Northern Taurid meteor shower 2011
13	Asteroid 30 Urania at opposition
14	Mercury at greatest elongation east
18	Mercury at highest altitude in evening sky Leonid meteor shower 2011 Moon at Last Quarter Mercury at dichotomy
19	Conjunction of the Moon and Mars
21	Shallow lakes beneath the surface of Europa
22	α-Monocerotid meteor shower 2011 Conjunction of the Moon and Saturn
23	The Moon at perigee
25	November Naked Astronomy podcast released New Moon Partial solar eclipse
26	Conjunction of the Moon and Mercury The Moon at perihelion Conjunction of the Moon and Venus
28	November Orionid meteor shower 2011 Asteroid 15 Eunomia at opposition
29	Venus at aphelion

December
1	Conjunction of Venus and Pluto
2	Supernova SN2011iv discovered Moon at First Quarter Pheonicid meteor shower 2011
4	Mercury at inferior solar conjunction
5	Mercury at perihelion The Moon at apogee
6	December φ-Cassiopeid meteor shower 2011 Close approach of the Moon and Jupiter Conjunction of the Moon and Jupiter
7	Puppid-Velid meteor shower 2011
9	Supernova SN2011iy discovered
8	The Moon at aphelion
9	Monocerotid meteor shower 2011
10	Uranus ends retrograde motion Total lunar eclipse Full Moon
12	σ-Hydrid meteor shower 2011
14	Geminid meteor shower 2011
16	Comae Berenicid meteor shower 2011
17	Conjunction of the Moon and Mars
18	Supernova SN2011ja discovered
17	Moon at Last Quarter
18	Mercury at dichotomy
20	December Naked Astronomy podcast released Close approach of the Moon and Saturn Conjunction of the Moon and Saturn December Leonis Minorid meteor shower 2011
21	The Moon at perigee
22	December solstice Lunar occultation of Delta Scorpii
23	Ursid meteor shower 2011
22	Conjunction of the Moon and Mercury
20	Mercury at highest altitude in morning sky
23	Mercury at greatest elongation west
24	Supernova SN2011jm discovered New Moon
25	The Moon at perihelion Jupiter ends retrograde motion
27	Conjunction of the Moon and Venus
29	134340 Pluto at solar conjunction

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