07/23/2019 – Ephemeris – Finding Cygnus the swan in the stars

Ephemeris for Tuesday, July 23rd. Today the Sun will be up for 14 hours and 59 minutes, setting at 9:18, and it will rise tomorrow at 6:20. The Moon, 1 day before last quarter, will rise at 12:50 tomorrow morning.

High in the east at 11 p.m. Is the constellation of Cygnus the swan, flying south through the Milky Way. It is also called the Northern Cross. At the left, the tail of the swan or the head of the cross is the bright star Deneb, one of the stars of the Summer Triangle. The next star right is Sadr the intersection of the body and the wings of the swan seen in flight, or the intersection of the two pieces of the cross. There are two or three stars farther to the right that delineate the swan’s long neck or upright of the cross, that ends with the star Alberio in the beak of the swan or foot of the cross. The wings of the swan span a couple of more stars on each side than the crosspiece of the cross.

The times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.

Addendum

Animated Cygnus finder chart. Included also are, beside Deneb, the other stars of the Summer Triangle: Vega and Altair and their constellations Lyra the harp and Aquila. See if you can find them. Click on the image to enlarge. Created using Stellarium.

07/22/2019 – Ephemeris – Apollo 11 heads home

Ephemeris for Monday, July 22nd. Today the Sun will be up for 15 hours and 1 minute, setting at 9:19, and it will rise tomorrow at 6:19. The Moon, 2 days before last quarter, will rise at 12:27 tomorrow morning.

50 years ago after a bit more than 2 hours working on the surface of the Moon, Neil Armstrong and Buzz Aldrin climbed back into the Lunar Module to stow the 48 pounds of samples they had taken and to rest up for the return trip to the Command Module and Mike Collins circling above them. After docking, they transferred the samples to the command module and jettisoned the LM. Then they fired the Service Module engine for 2 and a half minutes to send them back to Earth, and landing them in the Pacific Ocean on July 24th. Not knowing if they were contaminated by lunar pathogens, the crew was quarantined for 21 days. The crew was released from Quarantine on August 10th.

The times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.

Addendum

Lunar lander’s ascent module approaching the command module with Earth in the distance. Credit NASA.

The crew in a like raft in bio contamination suits after splashdown.. Credit NASA.

Left to right Neil Armstrong, Michael Collins, Buzz Aldrin accept greeting form President Nixon on the USS Hornet. Credit NASA.

07/19/2019 – Ephemeris – 50 years ago tomorrow humankind set foot on the Moon

Ephemeris for Friday, July 19th. Today the Sun will be up for 15 hours and 7 minutes, setting at 9:22, and it will rise tomorrow at 6:16. The Moon, 3 days past full, will rise at 11:14 this evening.

On this day, 50 years ago the combined Apollo 11 spacecraft Command and Service module with attached Lunar Module dropped into orbit of the Moon. The crew spotted a glow coming from the Aristarchus region, still on the night side of the Moon. Armstrong and Aldrin entered the LM to power it up and to get it ready for landing. The next day they undocked from the Command Module and began their 2 hour 33 minute descent to the Moon’s surface. As they neared the surface The astronauts found out they were going to miss the planned landing area and would land in a more boulder strewn area. Armstrong took control and guided the LM to a safe landing with less than 30 seconds of fuel remaining. The Eagle had landed.

The times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.

Addendum

Left to right Neil Armstrong, Mission Commander; Michael Collins, Command Module Pilot; and Buzz Aldrin, Lunar Module Pilot. Credit: NASA.

The Saturn V for the Apollo 11 mission lifts of from Pad 39A. Credit: NASA.

Aldrin with the PSEP instrument looking back at the LM. Credit NASA/Neil Armstrong.

Lunar Reconnaissance Orbiter image of the Apollo 11 landing area. Compare the location od the objects in the picture above with this image.  The flag was blown down by the lift off of the Ascent module when the Astronauts left the Moon. Credit NASA/LRO.

07/18/2019 – Ephemeris – Two Universe of Stories events today with the Grand Traverse Astronomical Society

Ephemeris for Thursday, July 18th. Today the Sun will be up for 15 hours and 9 minutes, setting at 9:23, and it will rise tomorrow at 6:15. The Moon, 2 days past full, will rise at 10:45 this evening.

The Traverse Area District Library system is hosting two events in their summer reading program: A Universe of Stories. They both run from 11 a.m. to 2 p.m. One is at the Northwestern Michigan College’s Rogers Observatory hosted by Dr. Jerry Dobek.

The second will be hosted at the Kingsley Library branch at Brownson Memorial Park, just south of the library, with the other members of the Grand Traverse Astronomical Society. Both locations will feature safe views of the Sun, if it’s clear, plus hands on activities and stories. This the 50th anniversary of the Apollo 11 Mission and the landing of the first humans on the Moon, a feat we want to repeat to stay and are also looking to land the first crews on Mars.

The times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.

Addendum

07/17/2019 – Ephemeris – Only two bright planets are visible

Ephemeris for Wednesday, July 17th. Today the Sun will be up for 15 hours and 11 minutes, setting at 9:24, and it will rise tomorrow at 6:14. The Moon, 1 day past full, will rise at 10:10 this evening.

Let’s look at the planets for this Apollo 11 anniversary week. Both Mercury and Mars are too close to the Sun to be seen. They’re still on the evening or east side of the Sun. Venus is on the west or morning side of the Sun and also too close to it to be visible. Bright Jupiter will be in the south-southeastern as it gets dark. It will pass the meridian, due south at 10:57 p.m. With steadily held binoculars a few of the 4 largest satellites of Jupiter can be seen. All four of Jupiter’s largest satellites can be spotted in telescopes. Jupiter will set at 3:29 a.m. Saturn will be lower down in the southeast in the evening, the brightest star-like object in that direction, but significantly dimmer than Jupiter.

The times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.

Addendum

The evening planets and the Moon at 10:30 p.m. July 17, 2019. Click on the image to enlarge.  Created using Stellarium.

The Moon as it might appear in binoculars or a small telescope at 11 p.m. July Created using Stellarium.Stellarium.

Jupiter and Saturn with the same magnification at 11p.m. July 17, 2019. Created using Cartes du Ciel (Sky Charts).

Planets and the Moon at sunset and sunrise of a single night starting with sunset on the right on July 17, 2019. The night ends on the left with sunrise on the 18th. Click on the image to enlarge. Created using my LookingUp program.

Mercury is not visible on the above chart.  It will pass inferior conjunction of the Sun on the 21st, and is too far south of the Sun to be above the horizon at either sunrise or sunset.

07/16/2019 – Ephemeris – 50 years ago today the Apollo mission left for the Moon

Ephemeris for Tuesday, July 16th. Today the Sun will be up for 15 hours and 12 minutes, setting at 9:25, and it will rise tomorrow at 6:13. The Moon, at full today, will rise at 9:30 this evening.

50 years ago today at 11:32 a.m. Eastern Daylight Time the most powerful rocket ever built roared into life. The Saturn V, a three stage rocket, 363 feet tall, which in turn launched two spacecraft, the Command and Service modules, and the Lunar Module, and three astronauts on their journey to destiny, Neil Armstrong, Edwin (Buzz) Aldrin, and Michael Collins. It was the start of the Apollo 11 mission. It happens that tonight the namesake of the rocket, the planet Saturn is to the right of the Moon. At launch the Moon was two days old, a thin crescent in the west that evening. Four days later they would be orbiting the Moon, and Armstrong and Aldrin would be descending to the Moon’s surface.

The times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.

Addenda

Apollo 11

Left to right Neil Armstrong, Mission Commander; Michael Collins, Command Module Pilot; and Buzz Aldrin, Lunar Module Pilot. Credit: NASA.

The Saturn V for the Apollo 11 mission lifts of from Pad 39A. Credit: NASA.

The Moon and Saturn tonight, 11 p.m. July 16, 2019. In reality the Moon will be so bright that Saturn will be almost overwhelmed. Created using Stellarium.

Here’s an excellent podcast series from the BBC:  13 Minutes to the Moon.

Partial Lunar Eclipse

The partial lunar eclipse today is not mentioned in the program because it is not visible locally.

Partial Lunar Eclipse of July 16, 2019. Click on image to enlarge. Credit NASA/GSFC/F. Espenak.

07/15/2019 – Ephemeris – The Apollo 1 tragedy

Ephemeris for Monday, July 15th. Today the Sun will be up for 15 hours and 14 minutes, setting at 9:25, and it will rise tomorrow at 6:12. The Moon, 1 day before full, will set at 5:48 tomorrow morning.

On January 27th, 1967 the crew of Apollo 1 were running a dress rehearsal of their upcoming launch. On board were Gus Grissom, veteran of the Mercury and Gemini programs, Ed White the first American to walk in space on Gemini 4, and rookie astronaut Roger Chaffee from my home town of Grand Rapids, Michigan. Five and a half hours after the test started one of the crew called out “Fire in the cockpit”. In a very few minutes the astronauts were dead. They were running in a pure oxygen atmosphere at a bit above atmospheric pressure and a spark may have ignited the flammable materials in the spacecraft. The accident delayed the program nearly 2 years as the capsule was redesigned.

The times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.

Addendum

Left to right: Virgil I. (Gus) Grissom, veteran of the second Mercury flight and Gemini 3, the first manned Gemini flight; Edward H. White first American space walker on Gemini 4, and rookie Roger B. Chaffee. Credit: NASA.

The outside of the Apollo 1 capsule after thr fire that took the three astronaut’s lives. Credit: NASA.