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As the subsiding crescent moon increases in the small hours of the early morning of Tuesday, Feb. 18, skywatchers will be preparing for an uncommon event. That early morning the moon glides in front of orange, starlike world Mars for viewers in much of main and eastern The United States and Canada, in what is known as an occultation.

Parts of the western and central U.S. and Canada will have the ability to view both the disappearance and reappearance of the Red Planet in a dark or twilight sky. From western Canada, the Pacific Northwest and northern portions of California and Nevada, only the end of the occultation will be seen, given that Mars will currently be behind the moon when it increases around 3:30 a.m. local time. On the other hand, throughout the Eastern U.S., the planet will both vanish and emerge after sunup.Under reasonably

dark skies, this event can be watched over western places with the naked eye or binoculars, although a telescope will provide the very best views. Over the Desert Southwest and parts of the Rocky Mountain States along and east of the Continental Divide, the entire event will occur under a dark sky, however will happen very low in the east-southeast; an open view of the horizon is needed. Now, Mars is reasonably faint at magnitude +1.2 and will be dimmed further by its low altitude, but it should not be tough to spot. Near and instantly east(best)of a line extending approximately from Santa

Barbara, California to Idaho Falls, Idaho to Havre, Montana, the brilliant limb of the moon occults the planet when it is still too low to view. However Mars’reappearance from behind the moon’s dark limb will be far more observable, due to the fact that the moon will be higher above the horizon and the planet will not be washed out by the crescent’s bright glare.Unlike the determine image of a star, which upon interaction with the moon appears to disappear or come back as if you have actually clicked a switch, the larger apparent size of Mars causes it to disappear or emerge more gradually. About 15 seconds need to expire for the moon to completely cover(or reveal)the tiny disk of Mars after the edges of the two bodies appear to make contact. But the period will be somewhat longer for locations well to the north or south, where the occultation is not almost main. Mars presently shows a gibbous disk with an evident size of 5.1 arc seconds. The first speck of light from the Red World when it reappears from behind the moon will be at the moon’s

dark limb and can be spotted by an observer looking in the right place with a small telescope. Mars will emerge into view as a tiny, dazzling intense blob– apparently like a burst of lava from some great lunar volcano.< img src="" alt="This diagram shows the course Mars will take behind the moon for a lots U.S. cities." class ="expandable lazy-image lazy-image-loading lazyload optional-image"onerror="if(this.src & & this.src.indexOf('missing-image. svg' )!==-1)return true;; this.parentNode.replaceChild (window.missingImage (), this)"sizes="auto"data-normal=""data-src=" "data-srcset=" 320w, 650w, 970w" data-sizes="automobile"data-original-mos=""data-pin-media=""> In order to help observers expect where Mars will disappear(behind the moon’s intense limb)and reappear(from behind the moon’s dark limb), the accompanying diagram shows the obvious course of Mars as seen from different cities. The numbers specify the cities as offered in this list. For some places(such as San Francisco, # 17), the disappearance will take place before moonrise, so its track left wing is not revealed. More hard farther east As one heads east, the occultation will take location after the break of dawn and the advance of early morning twilight. Throughout the northern and main Excellent Plains, in addition to the western half of Oklahoma and Texas, Mars will disappear in a dark sky, but golden

will be well advanced when it comes back. Binoculars or a telescope will be needed to see the introduction from behind the moon’s dark limb. From the Great Lakes, Greater Ohio Valley and the Deep South, Mars will vanish in a twilight sky and reappear after sunrise. And for New England, upstate New york city, Toronto and Montreal, the higher New York City location and New Jersey, Middle Atlantic Coast, Piedmont and Southeast Coast including Florida, the entire occultation will be a daytime affair. Trying to see the occultation from these regions will prove

to be quite a challenge to state the least! Prior to dawn, you’ll see Mars sitting less than a couple of degrees to the left of the 24%illuminated lunar crescent. Moving at roughly its own apparent size per hour, the moon will appear to slowly

creep closer to Mars as they slowly rose and the background sky turns progressively brighter. With the naked eye

alone, you’ll probably forget Mars about a half hour prior to daybreak, though it still must be easily visible through field glasses and little telescopes. To continue seeing it after dawn nevertheless, will need an extremely clear(haze-free )day. The surface area brightness of Mars( quantity of light per square arc second)has to do with equal to that of the moon. In the accompanying table, anticipated times at 28 cities are given for this”Mars eclipse. ” Included is whether the event in question takes place in a dark sky, at mid-twilight(30 to 60 minutes before sunrise ), intense golden (30 minutes to simply a few minutes prior to daybreak), near daybreak( within a couple of minutes of sunrise )and daytime(after sunrise).

For San Francisco and Seattle, where no time is noted under disappearance, that occasion occurs before moonrise. Disapearance Reappearance Atlanta, Georgia 7:07 a.m. Daytime 8:45 a.m. Daytime Austin, Texas 5:46 a.m. Dark sky 7:09 a.m. Near sunrise Boston, Massachusetts 7:44 a.m. Daytime 9:10 a.m. Daytime Chicago, Illinois 6:07 a.m. Brilliant twilight 7:35 a.m. Daytime Denver, Colorado 4:41 a.m. Dark sky 6:02

a.m. Mid-twilight Glimpse, Newfoundland, Canada 9:48 a.m. Daytime 11:00 a.m. Daytime Helena, Montana 5:57 a.m. Dark sky

Houston, Texas 5:48

a.m. Dark sky 7:15 a.m. Daytime Kansas City,

Missouri 5:52 a.m. Dark

sky 7:02 a.m. Daytime Las Vegas, Nevada 3:36 a.m. Dark sky
4:40 a.m. Dark sky Los

Angeles, California 3:38 a.m. Dark sky 4:29
a.m. Dark sky Memphis, Tennessee 5:57 a.m. Mid-twilight

7:30 a.m. Daytime
Mexico City, Mexico 6:03 a.m. Dark sky 6:43 a.m. Brilliant twilight Miami, Florida

7:15 a.m. Daytime 8:57 a.m. Daytime Monterrey, Mexico 5:47 a.m. Dark sky 6:56 a.m. Bright golden Montreal, Quebec, Canada 7:39 a.m. Daytime 8:59 a.m. Daytime
New Orleans, Louisiana

5:55 a.m. Mid-twilight 7:29 a.m. Daytime New York City, New York City 7:36 a.m. Daytime 9:05 a.m. EST Daytime Quebec City, Quebec, Canada 7:46
a.m. Daytime 9:03 a.m. Daytime

Salt Lake City, Utah 4:37 a.m. Dark sky
5:51 a.m. Dark sky San Francisco, California 4:30 a.m. Dark sky Seattle, Washington
4:47 a.m. Dark sky Sioux Falls, South Dakota 5:53 a.m. Dark sky 6:18 a.m. Near dawn Toronto, Ontario, Canada 7:26 a.m. Daytime 8:50 a.m. Daytime Tucson, Arizona 4:38 a.m. Dark sky 5:40 a.m. Dark sky
Tulsa, Oklahoma 5:49 a.m. Dark sky 7:17 a.m. Near daybreak Washington, D.C. 7:27 a.m. Daytime 9:00 a.m. Daytime Winnipeg, Manitoba, Canada 6:02 a.m. Dark sky
7:18 a.m. Brilliant twilight

But wait, there’s more!For a listing

of forecasted times for over 700 places, go

to: For a map illustrating the

region of visibility of this occultation, go to:!.?.!The blue-green curves reveal where the disappearance or reappearance occurs at moonrise (left side) or moonset(right side); there is no northern limitation as that
misses out on the Earth to the north. The southern limit of the occultation, from which a
partial occultation will show up in a strip about 5 miles wide, crosses
the n.e. Pacific Ocean and southern Mexico(white line, event during the night
), Central America(

dark blue line that’s hardly noticeable, event during early morning golden), and northern S. America and the Atlantic Ocean (red dotted line, event during
daytime ). Times and map are thanks to Mr. David Dunham, International Occultation Timers association. Joe Rao serves as a trainer and visitor speaker at New York’s. He writes about astronomy for, the and other publications. Follow us on Twitter and on. All About Area publication takes you on an awe-inspiring journey through our planetary system and beyond, from the fantastic innovation and spacecraft that allows
humankind to endeavor into orbit, to the complexities of space science.View Deal