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April 2015 Astronomy Calendar by Dave Mitsky Some Information Supplied And/Or Added by Tony Donnangelo All Times Are Daylight Sa

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April 2015 Astronomy Calendar by Dave Mitsky Some Information Supplied And/Or Added by Tony Donnangelo All Times Are Daylight Sa April 2015 Astronomy Calendar by Dave Mitsky Some information supplied and/or added by Tony Donnangelo All times are Daylight Saving Time (-4 hrs. U.T.) Events listed are based on a location of 40°N in the Eastern US and may not be visible in all areas. Concerning moderate and minor meteor shower activity: Do not have any high expectations. This general information is to account for why you might be seeing a few more than normal meteors during your observing session. Lunar light rays may occur prior to or after the predicted time. Initial observations might have occurred after the ray’s inception or continued after the observer’s session. Rays may last a very short time or for many hours. Obtain further information; send reports (including non- occurrences and miss-calculations), photos, and observations of new rays to: The Robinson Lunar Observatory: http://www.lunar-occultations.com/rlo/rlondx.htm. 4/1 Schiller C (sunrise) lunar light ray predicted to occur at 1:08 a.m. 4/1 The Moon is at apogee, subtending 29' 26'' from a distance of 406,012 kilometers (252,284 miles), at 11:00 a.m. 4/2 Comet 22P/Kopff at opposition at 1.466 A.U. 4/2 170th Anniversary (1845), first photo of Sun taken by Louis Fizeau & Leon Foucault. 4/3 Comet 86P/Wild is at perihelion at 2.264 A.U. 4/4 Comet P/2004 R1 (McNaught) at opposition at 0.940 A.U. 4/4 A total lunar eclipse visible primarily from locations in the Pacific Ocean reaches its maximum at 4:00:16 a.m. 4/4 Full Moon, known as the Egg or Grass Moon, occurs at 8:06 a.m. 4/5 Easter Sunday. 4/5 Comet 169P/NEAT at opposition at 2.903 A.U. 4/5 Comet P/2006 F1 (Kowalski) is at closest approach to Earth at 3.946 A.U. 4/5 Delta Pavonidis meteor shower (minor activity) peaks on 5/6. Duration is from 3/21 to 4/8. Observing and History: http://meteorshowersonline.com/showers/delta_pavonids.html 4/6 Comet 88P/Howell is at perihelion at 1.359 A.U. 4/6 Comet C/2012 F3 (PANSTARRS) is at perihelion at 3.457 A.U. 4/6 Comet C/2012 K8 (Lemmon) is at closest approach to Earth at 6.433 A.U. 4/6 Andre-Louis Danjon's 125th Birthday (1890). 4/6 Lame (sunset) lunar light ray predicted to occur at 1:43 a.m. 4/6 Uranus is in conjunction with the Sun at 10:00 a.m. 4/6 Crisium, Mare (sunset) lunar light ray predicted to occur at 11:56 p.m. 4/7 Comet P/2012 T1 (PANSTARRS) is at closest approach to Earth at 2.902 A.U. 4/7 April Virginids meteor shower (minor activity) peaks on 7/8. Duration is from 1st to 16th. Observing and History: http://meteorshowersonline.com/showers/april_virginids.html 4/7 Alpha Virginis meteor shower (minor activity) peaks through the 18th. Duration is from 3/10 through 5/6. Observing and History: http://meteorshowersonline.com/showers/alpha_virginids.html 4/8 Mercury Passes 0.5° from Uranus. 4/8 Asteroid (87) Sylvia (magnitude 12.7) reaches opposition. 4/8 35th Anniversary (1980)of Voyager 1's discovery of Saturn's moon Telesto. 4/8 Andrew Graham's 200th birthday (1815). 4/8 Saturn is 2° south of the Moon at 9:00 a.m. 4/8 Jupiter is stationary at 4:00 p.m. 4/9 Lecture on Europa Report being held in Houston, Texas. 4/9 Lecture on The Galaxy Star Formation Rate-Stellar Mass Correlation in Ithaca, New York. 4/10 Mercury is in superior conjunction at 12:00 a.m. 4/10 Maurolycus (sunset) lunar light ray predicted to occur at 2:32 a.m. 4/10 Alexander (sunset) lunar light ray predicted to occur at 3:17 a.m. 4/10 Julius Caesar (sunset) lunar light ray predicted to occur at 4:21 a.m. 4/10 Calippus (sunset) lunar light ray predicted to occur at 5:23 a.m. 4/11 Asteroid (53) Kalypso (magnitude 12.5) reaches opposition. 4/11 Comet 243P/NEAT at opposition at 4.173 A.U. 4/11 Comet C/2014 G1 (PANSTARRS) is at closest approach to Earth at 5.668 A.U. 4/11 Comet C/2013 H2 (Boattini) is at closest approach to Earth at 7.331 A.U. 4/11 Dwarf Planet (136108) Haumea at opposition at 49.831 A.U. 4/11 Catalina State Park Star Party being held in Tucson, Arizona. 4/12 Yuri's Night World Space Party. 4/12 Comet 253P/PANSTARRS at opposition at 3.891 A.U. 4/12 Mars is at the ascending node today. 4/12 The Curtiss Cross, an X-shaped clair-obscure illumination effect located between the craters Parry and Gambart, is predicted to begin at 3:03 p.m. 4/13 Comet C/2014 N2 (PANSTARRS) at opposition at 2.350 A.U. 4/13 Richard Assmann's 170th birthday (1845). 4/13 Bruno Rossi's 110th birthday (1905). 4/13 31st Space Symposium being held through the 16th in Colorado Springs, Colorado. 4/14 Comet C/2012 K8 (Lemmon) at opposition at 6.437 A.U. 4/14 Luigi Carnera's 140th birthday (1875). 4/14 Gamma Virginids meteor shower (minor activity) peaks on 14/15. Duration is from 5th through 21st. Observing and History: http://meteorshowersonline.com/showers/gamma_virginids.html 4/15 Comet C/2014 G3 (PANSTARRS) is at closest approach to Earth at 3.742 A.U. 4/15 Mercury is at the ascending node today. 4/15 Mid-South Star Gaze and Astronomy Conference being held through the 18th in French Camp, Mississippi. 4/15 Neptune is 4° south of the Moon at 9:00 a.m. 4/16 Comet 210P/Christensen is at closest approach to Earth at 2.269 A.U. 4/16 Comet C/2014 G3 (PANSTARRS) at opposition at 3.743 A.U. 4/16 Asteroid 20 Massalia is at closest approach to Earth at 1.455 A.U. 4/16 Lecture on The Young and the Restless Stars being held in Ithaca, New York. 4/16 Petrus Apianus' 520th birthday (1495). 4/17 Comet 131P/Mueller at opposition at 3.919 A.U. 4/17 Comet 236P/LINEAR at opposition at 4.318 A.U. 4/17 The Moon is at perigee, subtending 33' 06'' from a distance of 361,023 kilometers (224,330 miles), at 12:00 a.m. 4/17 Pluto is stationary at 3:00 a.m. 4/17 Enchanted Skies Star Parties being held through the 18th in Magdalena, New Mexico. 4/17 Librids meteor shower (minor activity) peaks on 17/18 . Duration is from 3/11 through 5/5. Observing and History: http://meteorshowersonline.com/showers/librids.html 4/18 Comet 219P/LINEAR at opposition at 3.170 A.U. 4/18 Comet C/2013 H2 (Boattini) at opposition at 7.338 A.U. 4/18 Venus is at perihelion today. 4/18 Northeast Astronomy Forum being held through the 19th in Suffern, New York. 4/18 New Moon (lunation 1142) occurs at 2:57 p.m. 4/19 Mercury is at perihelion today. 4/19 Comet P/2008 O2 (McNaught) at opposition at 4.009 A.U. 4/19 Asteroid (2) Pallas is stationary at 6:00 p.m. 4/19 April Ursids meteor shower (minor activity) peaks on 19/20. Duration is from 3/18 to 5/9. Observing and History: http://meteorshowersonline.com/showers/april_ursids.html 4/20 Comet 218P/LINEAR is at closest approach to Earth at 0.468 A.U. 4/20 Astronomy Week. 4/20 Asteroid (20) Massalia (magnitude 9.4) is at opposition at 6:00 a.m. 4/21 The Moon is 0.9° north of the first-magnitude star Aldebaran (Alpha Tauri), with an occultation occurring in northwestern Russia, Scandinavia, the extreme northern British Isles, Iceland, Greenland, Canada, and the northwestern United States, at 1:00 p.m. 4/21 Venus is 7° north of the Moon at 2:00 p.m. 4/22 Earth Day. 4/22 Asteroid (64) Angelina (magnitude 10.9) reaches opposition. 4/22 Lyrids meteor shower (major activity-20 per hour) peaks at 7 p.m. Duration is from 16th to 25th. Observing and History: http://meteorshowersonline.com/lyrids.html 4/23 Asteroid (19) Fortuna (magnitude 10.9) reaches opposition. 4/23 Asteroid (11) Parthenope (magnitude 10.0) reaches opposition. 4/23 Comet 218P/LINEAR is at perihelion at 1.171 A.U. 4/23 Mercury is 1.4° north of Mars at 3:00 a.m. 4/23 Pi Puppis meteor shower (minor activity) peaks on 23/24. Duration is from 18th to 25th. Observing and History: http://meteorshowersonline.com/showers/pi_puppids.html 4/23 Posidonius (sunrise) lunar light ray predicted to occur at 10:15 p.m. 4/24 Comet 10P/Tempel at opposition at 1.415 A.U. 4/24 Asteroid (59) Elpis (magnitude 12.5) reaches opposition. 4/25 Astronomy Day. 4/25 Comet C/2014 R1 (Borisov) is at closest approach to Earth at 1.776 A.U. 4/25 Griffith Observatory Star Party being held in Los Angeles, California. 4/25 Gemma Frisius (sunrise) lunar light ray predicted to occur at 12:23 a.m. Moonset 1:39 a.m. 4/25 First Quarter Moon occurs at 7:55 p.m. 4/25 Barrow (sunrise) lunar light ray predicted to occur at 9:25 p.m.
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