Definitions

1. Perigee is the nearest approach point of a satellite or celestial body from Earth at which the orbital velocity will be at its maximum.
2. Perigee is the point at which a body (the moon, in this case)in orbit around the earth is at least distance from the earth. (Web site)
3. Perigee is the point in the orbit which is closest to the Earth center; this also changes with time.
4. Perigee is the distance of closest approach, whereas apogee is its farthest recession.
5. Perigee is the term for Earth orbiting objects and Periapsis is the generic term for any orbit around any other object. (Web site)

Words

1. In other words, the satellite travels faster at the perigee and at the apogee. (Web site)

Terms

1. Combining these expressions gives the argument of perigee solely in terms of the frozen eccentricity, the current tolerance, and the time in the cycle. (Web site)

Place

1. Where the Full Moon takes place in terms of perigee and apogee will also affect things. (Web site)
2. Example: When ARGP = 0, the perigee occurs at the same place as the ascending node. (Web site)
3. The perigee stays in the same place at this inclination.

Required

1. Another velocity change is required to raise the perigee into a circular orbit. (Web site)

Publication

1. For the literary journal, see Perigee: Publication for the Arts. (Web site)

Retrograde

1. If a retrograde burn is done at the perigee of an ellipse, the burn will become more circularized. (Web site)

Perigee Velocity Augmentation

1. This approach to perigee velocity augmentation is adequate but is not very efficient. (Web site)

Orbital Elements

1. Monitor the Orbital Elements as you adjust the perigee or apogee of the orbit.
2. For near-circular orbits, the eccentricity (e) and the argument of perigee (ω) can be ill-defined as orbital elements. (Web site)

Perigee Shift Small

1. An inclination of 63.4° is normally used to keep the perigee shift small. (Web site)

Perigee Ω

1. The J 2 harmonic, due to the earth's oblateness, causes the node Ω and argument of perigee ω of an orbit to change. (Web site)

Point Nearest

1. Perigee: The point nearest the earth's center in the orbit of the moon or a satellite.

Apogee Longitude

1. An increase in argument of perigee causes an eastward movement of apogee longitude, while a decrease causes a westward movement. (Web site)

Orbital Plane

1. The component of perturbations in the orbital plane causes the perigee to rotate in the orbital plane. (Web site)

Lunar Perigee

1. At its closest approach (the lunar perigee) the moon is 221,460 miles (356,410 km) from the Earth. (Web site)

Perigee Altitudes

1. Repeat in stages, or as necessary, over many orbits to change the apogee and perigee altitudes.
2. These points are where we will change the apogee or perigee altitudes.
3. The preferred orbits have apogee and perigee altitudes of 20074 and 654 kilometers, respectively. (Web site)

Perigee 72

1. Firing propulsion thrusters 50 of spacecraft 10 during consecutive passes around apogee 66 raises the perigee 72 of each successive intermediate orbit 74. (Web site)

Apogee Point

1. The apogee point is at the very top of the ground track (when argument of perigee is the nominal 270°). (Web site)

Anomalistic Month

1. The orbital period of the Moon from perigee to apogee and back to perigee is called the anomalistic month. (Web site)

Apogee Altitude

1. If we want to change the apogee altitude we will need to fire the engines at perigee.

Radar

1. When the satellite was near perigee, it was observed by networks of ground-based Baker-Nunn cameras, as well as being tracked by radio and radar.

Distances

1. Using the conservation of angular momentum, one can determine the distances to apogee and perigee, and the satellite's velocity at apogee and perigee.

Surface

1. Perigee The point in an elliptical satellite orbit which is closest to the surface of the earth. (Web site)
2. HEOs typically have a perigee at about 500 km above the surface of the earth and an apogee as high as 50,000 km. (Web site)

Fig

1. For example, in the crossover situation depicted in FIG. 5, one satellite 20 is at perigee and is not visible from locations in the United States. (Web site)

Advance

1. The advance of perigee is suppressed by setting the inclination at one of the critical values. (Web site)

Value

1. A value of the argument of perigee is selected and corrected until both the node and the argument of perigee remain constant over the ToD. (Web site)

Average

1. It is only when the Moon is closer to the Earth than average (near its perigee) that a total eclipse occurs.

Month

1. If you started a sidereal month with the moon at apogee, that condition would exist twice in that month and perigee once, or vice versa.
2. The Moon orbits the Earth in about a month, incidentally, so it goes from apogee to perigee every two weeks. (Web site)

Plane

1. Large in plane (LIP) maneuvers are required to correct the argument of perigee, eccentricity and semimajor axis. (Web site)

Case

1. The Molniya orbit, with an argument of perigee near 90°, is an example of such a case.
2. In which case, the entire maneuver ends up with an increase in perigee altitude. (Web site)

Atmosphere

1. To prevent the shuttle from following the external tank back into the atmosphere, the OMS engines are fired to raise the perigee out of the atmosphere. (Web site)
2. The resultant slowing of the Shuttle lowers its orbital perigee down into the upper atmosphere. (Web site)

Venus

1. The perigee and apogee relationship between Earth and Venus is described by a nested pentagram pair. (Web site)
2. Mercurys apogee is succeeded by the perigee of Venus, whose apogee, finally, almost reaches the sun's perigee. (Web site)

Respect

1. Anyone using the words "apogee" or "perigee" with respect to an orbit around anything but the Earth is being a verbal slob.
2. This can be achieved using the sun-facing perigee strategy discussed above with respect to FIGS. 5A-5E. (Web site)

Drag

1. Increased drag does not always decrease lifetime for an eccentric orbit - it reduces the apogee, so the perturbations, that force the perigee down, diminish. (Web site)

Zenith

1. But the moon is not always at her zenith when she reaches her perigee, which is once a month. (Web site)

Equal

1. The probability per unit time is largest when the perigee and apogee are nearly equal (i.e., the orbit is nearly circular).

Function

1. The fortnightly tides vary in strength as a function of the time-separation of perigee and syzygy.

Zero

1. Perigee burns should be conducted when the expression in the brackets is greater than zero; apogee burns when it is less than zero. (Web site)
2. Molniya orbits are designed so that the perturbations in argument of perigee are zero. (Web site)

Possible

1. FIG. 4 depicts examples of other ground track shapes that are possible through adjustment of the argument of perigee. (Web site)
2. A second phase then began on 20 July with a daytime burn designed to decrease the perigee as much as possible.

Lowest

1. The drag is the strongest at the perigee when the altitude is the lowest and the satellite has the biggest velocity. (Web site)
2. Perigee; the lowest, fastest, part of an elliptical orbit. (Web site)
3. It is the distance from the geometric center of the ellipse to either the apogee or perigee (The highest (apo) and the lowest (peri)). (Web site)

Result

1. As a result, the argument of perigee is the only remaining variable. (Web site)

Nearest

1. Perigee: the point at which an orbiting object is nearest to the body being orbited.

Revolutions

1. MEAN MOTION: Number of revolutions (perigee to perigee) completed by satellite in a solar day (1440 minutes).

Revolution

1. As is known, apogee and perigee are defined as being maximum and minimum distances relative to the earth as reached by a space vehicle during one revolution. (Web site)
2. It has an argument of perigee of 270 deg, and its ground traces repeat every other revolution.

Epoch

1. ISS Orbit (as of this morning, 8:16am EDT [= epoch]) Mean altitude -- 348.6 km Apogee height – 354.8 km Perigee height -- 342.4 km Period -- 91.51 min. (Web site)

Period

1. In this context, a revolution or period is defined as the time from one perigee to the next. (Web site)
2. ISO was placed in a highly elliptical orbit with a perigee at around 1000 km; an apogee at 70 500 km; and a period of almost 24 hours.
3. Formulated in another way: the fumocy is the period that it takes the Sun to return to the perigee of the Moon's orbit. (Web site)

Hence

1. Hence, the argument of perigee of this orbit is equal to or close to 0 or 180 degrees. (Web site)

Categories

1. Apogee
2. Orbit
3. Closest
4. Encyclopedia of Keywords > Places > Earth
5. Argument

Related Keywords

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