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Image:HD 210277.jpg
HD 210277 |
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| Observation data Epoch J2000 |
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| Constellation (pronunciation) |
Aquarius |
| Right ascension | 22h 09m 29. In Astronomy, an epoch is a moment in time used as a reference for the Orbital elements of a Celestial body. In common usage a constellation is a group of celestial bodies that are connected together in some arrangement typically stars to form a visible figure or picture Each culture has its own Constellations usually based on Mythology. Right ascension (abbrev RA; symbol α) is the Astronomical term for one of the two Coordinates of a point on the Celestial sphere 8657s |
| Declination | -07° 32′ 55. In Astronomy, declination (abbrev dec or δ) is one of the two coordinates of the Equatorial coordinate system, the other being either 155″ |
| Apparent magnitude (V) | 6. The apparent magnitude ( m) of a celestial body is a measure of its Brightness as seen by an observer on Earth, normalized to the value 63 |
| Characteristics | |
| Spectral type | G0V |
| Astrometry | |
| Radial velocity (Rv) | -24. In Astronomy, stellar classification is a classification of Stars based initially on photospheric temperature and its associated Spectral characteristics Astrometry is the branch of Astronomy that relates to precise measurements and explanations of the positions and movements of Stars and other celestial bodies Radial velocity is the Velocity of an object in the direction of the line of sight (i 1 km/s |
| Proper motion (μ) | RA: 85. The proper motion of a Star is the measurement of its change in position in the sky over time after Improper motions are accounted for 48 mas/yr Dec. A minute of arc, arcminute, or MOA is a unit of angular measurement, equal to one sixtieth (1/60 of one degree. A year (from Old English gēr) is the time between two recurrences of an event related to the Orbit of the Earth around the Sun : -449. 83 mas/yr |
| Parallax (π) | 46. A minute of arc, arcminute, or MOA is a unit of angular measurement, equal to one sixtieth (1/60 of one degree. A year (from Old English gēr) is the time between two recurrences of an event related to the Orbit of the Earth around the Sun Parallax is an apparent displacement or difference of orientation of an object viewed along two different lines of sight and is measured by the angle or semi-angle of inclination between 97 ± 0. 79 mas |
| Distance | 69 ± 1 ly (21. A minute of arc, arcminute, or MOA is a unit of angular measurement, equal to one sixtieth (1/60 of one degree. Distance is a numerical description of how far apart objects are A light-year or light year (symbol ly) is a unit of Length, equal to just under ten trillion Kilometres As defined by 3 ± 0. 4 pc) |
| Absolute magnitude (MV) | 7. History The first direct measurements of an object at interstellar distances were undertaken by German Astronomer Friedrich Wilhelm Bessel in 1838 In Astronomy, absolute magnitude (also known as absolute visual magnitude) is the Apparent magnitude an object would have if it were at a standard 34 |
| Details | |
| Mass | ? M☉ |
| Radius | ? R☉ |
| Luminosity | ? L☉ |
| Temperature | ? K |
| Metallicity | ? |
| Rotation | ? |
| Age | ? years |
| Other designations | |
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NLTT 53073, HIC 109378, SAO 145906, BD-08° 5818, GJ 848. Mass is a fundamental concept in Physics, roughly corresponding to the Intuitive idea of how much Matter there is in an object The solar mass is a standard way to express Mass in Astronomy, used to describe the masses of other Stars and galaxies. Remote Authentication Dial In User Service ( RADIUS) is a networking protocol that provides centralized access authorization and accounting management for people or computers In Astronomy, the solar radius is a unit of Length used to express the size of Stars It is equal to the current radius of the Sun. Luminosity has different meanings in several different fields of science The solar luminosity, L_\odot is a unit of Luminosity ( power emitted in the form of Photons conventionally used by Astronomers to Temperature is a physical property of a system that underlies the common notions of hot and cold something that is hotter generally has the greater temperature The kelvin (symbol K) is a unit increment of Temperature and is one of the seven SI base units The Kelvin scale is a thermodynamic In Astronomy and Physical cosmology, the metallicity of an object is the proportion of its matter made up of Chemical elements other than Hydrogen Stellar rotation is the angular motion of a Star about its axis A star is a massive luminous ball of plasma. The nearest star to Earth is the Sun, which is the source of most of the Energy on Earth A year (from Old English gēr) is the time between two recurrences of an event related to the Orbit of the Earth around the Sun A star catalogue, or star catalog, is an Astronomical catalogue that lists Stars In Astronomy, many stars are referred to simply by catalogue 4, HIP 109378, Ci 20 1339, GJ 9769, LTT 8887, SPOCS 960, GC 30991, HD 210277, PLX 5356, uvby98 100210277, GCRV 13920, HERZ 16289, PPM 206033, YZ 97 7945. PLX, or Picatinny Liquid Explosive, is a liquid binary Explosive, a mixture of 95% Nitromethane and 5% Ethylene diamine (EDA The Hard seat ( abbreviated YZ, is the lowest class of seating in China Railway
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| Database references | |
| SIMBAD | data |
| Database references | |
| SIMBAD | data |
HD 210277 is a 7th magnitude star in the constellation Aquarius. For the missile mounting see Mistral missile SIMBAD (the S et of I dentifications M easurements and B ibliography for For the missile mounting see Mistral missile SIMBAD (the S et of I dentifications M easurements and B ibliography for The apparent magnitude ( m) of a celestial body is a measure of its Brightness as seen by an observer on Earth, normalized to the value A star is a massive luminous ball of plasma. The nearest star to Earth is the Sun, which is the source of most of the Energy on Earth In common usage a constellation is a group of celestial bodies that are connected together in some arrangement typically stars to form a visible figure or picture Aquarius ( Water -bearer or cup-bearer is the eleventh sign of the Zodiac, situated between Capricornus and Pisces. It is a yellow dwarf star (spectral type G0V) like our Sun. In Astronomy, a G V star is a Main-sequence Star of spectral type G and luminosity class V In Astronomy, stellar classification is a classification of Stars based initially on photospheric temperature and its associated Spectral characteristics The Sun (Sol is the Star at the center of the Solar System. It has a mass around 0. 92 times that of our Sun and is estimated to be around 12 billion years old[1]. Since its distance is about 69 light years, it is not visible to the unaided eye. A light-year or light year (symbol ly) is a unit of Length, equal to just under ten trillion Kilometres As defined by With binoculars it is easily visible. Binocular telescopes, or binoculars (also known as field glasses are two identical or Mirror - symmetrical telescopes mounted side-by-side and
The star has a massive extrasolar planet orbiting it. An extrasolar planet, or exoplanet, is a Planet beyond the Solar System, orbiting around other Stars As of September 2008 312 Also, in 1999 the discovery of a circumstellar disk was announced by T. Year 1999 ( MCMXCIX) was a Common year starting on Friday (link will display full 1999 Gregorian calendar) A protoplanetary disk (or proplyd) is a rotating Circumstellar disk of dense gas surrounding a young newly formed star a T Tauri star or Herbig star E. Trilling et al. based on observations in infrared wavelengths. Infrared ( IR) radiation is Electromagnetic radiation whose Wavelength is longer than that of Visible light, but shorter than that of In Physics wavelength is the distance between repeating units of a propagating Wave of a given Frequency. The disk is probably similar to the Kuiper belt in our Solar system. The Kuiper belt (ˈkaɪpɚ to rhyme with "viper" sometimes called the Edgeworth-Kuiper belt, is a region of the Solar System beyond the planets extending The Solar System consists of the Sun and those celestial objects bound to it by Gravity.
Contents |
HD 210277 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 1. An extrasolar planet, or exoplanet, is a Planet beyond the Solar System, orbiting around other Stars As of September 2008 312 The following are lists of stars with confirmed Extrasolar planets. The elements of an orbit are the parameters needed to specify that Orbit uniquely given a model of two point-masses obeying the Newtonian laws of motion and the In Geometry, the semi-major axis (also semimajor axis) is used to describe the dimensions of ellipses and hyperbolae 138 ± 0. 066 AU |
| Eccentricity | (e) | 0. The astronomical unit ( AU or au or au or sometimes ua) is a unit of Length based on the distance from the Earth to the In Astrodynamics, under standard assumptions, any Orbit must be of Conic section shape 476 ± 0. 017 |
| Orbital period | (P) | 442. The orbital period is the time taken for a given object to make one complete Orbit about another object 19 ± 0. 50 d |
| Angular distance | (θ) | 50 mas |
| Longitude of periastron |
(ω) | 119. A day (symbol d is a unit of Time equivalent to 24 Hours and the duration of a single Rotation of planet Earth with respect to the In Mathematics (in particular Geometry and Trigonometry) and all Natural sciences (including astronomy geophysics etc the angular distance A minute of arc, arcminute, or MOA is a unit of angular measurement, equal to one sixtieth (1/60 of one degree. In Astrodynamics, the longitude of the periapsis (symbolized \varpi of an orbiting body is the Longitude (measured from the point of the vernal equinox In Celestial mechanics, an apsis, plural apsides (ˈæpsɨdɪːz is the point of greatest or least distance of the Elliptical orbit of an object from 1 ± 2. 8° |
| Time of periastron | (T0) | 2,450,104. In Celestial mechanics, an apsis, plural apsides (ˈæpsɨdɪːz is the point of greatest or least distance of the Elliptical orbit of an object from 3 ± 2. 6 JD |
| Semi-amplitude | (K) | 38. The Julian date (JD is the interval of time in days and fractions of a day since 4713 B Amplitude is the magnitude of change in the oscillating variable with each Oscillation, within an oscillating system 94 ± 0. 75 m/s |
| Physical characteristics | ||
| Mass | (m) | >1. Mass is a fundamental concept in Physics, roughly corresponding to the Intuitive idea of how much Matter there is in an object 29 ± 0. 11 MJ |
| Discovery information | ||
| Discovery date | 1998 | |
| Discoverer(s) | Marcy et al. Jupiter mass is the unit of Mass equal to one Jupiter (18986 × 1027 kg, 317 Year 1998 ( MCMXCVIII) was a Common year starting on Thursday (link will display full 1998 Gregorian calendar) Geoffrey W Marcy (born September 29, 1954) is famous for discovering more Extrasolar planets than anyone else 70 out of the first 100 to be discovered | |
| Detection method | Radial velocity | |
| Discovery status | Published | |
HD 210277 b was discovered in 1998 by the California and Carnegie Planet Search team using the highly successful radial velocity method. Any Planet is an extremely faint light source compared to its parent Star. Year 1998 ( MCMXCVIII) was a Common year starting on Thursday (link will display full 1998 Gregorian calendar) The California and Carnegie Planet Search was started as the San Francisco State University Planet Search in 1987 by Geoffrey Marcy and R Radial velocity is the Velocity of an object in the direction of the line of sight (i The planet is at least 24% more massive than Jupiter. The mean distance of the planet from the star is slightly more than Earth's distance from the Sun. EARTH was a short-lived Japanese vocal trio which released 6 singles and 1 album between 2000 and 2001 However, the orbit is very eccentric, so at periastron this distance is almost halved, and at apastron it is as distant as Mars is from the Sun[3]. In Astrodynamics, under standard assumptions, any Orbit must be of Conic section shape In Celestial mechanics, an apsis, plural apsides (ˈæpsɨdɪːz is the point of greatest or least distance of the Elliptical orbit of an object from In Celestial mechanics, an apsis, plural apsides (ˈæpsɨdɪːz is the point of greatest or least distance of the Elliptical orbit of an object from
In 2000 group of scientists proposed, based on preliminary data from the Hipparcos astrometrical satellite, that the planet would have an inclination of 175. 2000 ( MM) was a Leap year that started on Saturday of the Common Era, in accordance with the Gregorian calendar. Hipparcos (an Acronym for Hi gh P recision Par allax Co llecting S atellite) was an Astrometry mission Astrometry is the branch of Astronomy that relates to precise measurements and explanations of the positions and movements of Stars and other celestial bodies This article is about artificial satellites For natural satellites also known as moons see Natural satellite. 8° and a true mass of 18 times Jupiter making it a brown dwarf instead of a planet[4]. The term true mass is synonymous with the term Mass, but is used in Astronomy to differentiate the measured mass of a planet from the lower limit of mass usually obtained Brown dwarfs are sub- stellar objects with a mass below that necessary to maintain Hydrogen -burning Nuclear fusion reactions in their cores as do stars However, it is statistically very improbable, and the claim has not been confirmed. Statistics is a mathematical science pertaining to the collection analysis interpretation or explanation and presentation of Data. If the planet orbits in the same plane as the circumstellar disk, which seems a plausible assumption, it would have an inclination of 40° and an absolute mass of 2. Inclination in general is the Angle between a Reference plane and another plane or axis of direction 2 times Jupiter[5].
HD 210277 dust disk
A dust disk around the star HD 210277, similar to that produced by the Kuiper Belt in our solar system was imaged in 1999. The Kuiper belt (ˈkaɪpɚ to rhyme with "viper" sometimes called the Edgeworth-Kuiper belt, is a region of the Solar System beyond the planets extending Year 1999 ( MCMXCIX) was a Common year starting on Friday (link will display full 1999 Gregorian calendar) It lies between 30 and 62 AU from the star and is estimated to be between 50 and 80 times as massive as our solar system's Kuiper Belt[5]. The astronomical unit ( AU or au or au or sometimes ua) is a unit of Length based on the distance from the Earth to the
References
- ^ G. Gonzalez, G. Wallerstein, S. H. Saar (1999). "Parent Stars of Extrasolar Planets. IV. 14 Herculis, HD 187123, and HD 210277" (). Astrophysical Journal 511: L111 – L114. The Astrophysical Journal (abbreviated to ApJ or Astrophys J) is a Scientific journal covering Astronomy and Astrophysics. doi:. A digital object identifier ( DOI) is a permanent identifier given to an Electronic document.
- ^ Butler, R. et al. (2006). "Catalog of Nearby Exoplanets" (abstract). The Astrophysical Journal 646: 505 – 522. The Astrophysical Journal (abbreviated to ApJ or Astrophys J) is a Scientific journal covering Astronomy and Astrophysics. doi:. A digital object identifier ( DOI) is a permanent identifier given to an Electronic document. (web version)
- ^ G. W. Marcy, R. P. Butler, S. S. Vogt, D. Fischer, M. C. Liu (1999). "Two New Candidate Planets in Eccentric Orbits" (abstract). Astrophysical Journal 520: 239 – 247. The Astrophysical Journal (abbreviated to ApJ or Astrophys J) is a Scientific journal covering Astronomy and Astrophysics. doi:. A digital object identifier ( DOI) is a permanent identifier given to an Electronic document.
- ^ I. Han, D. C. Black, G. Gatewood (2001). "Preliminary Astrometric Masses for Proposed Extrasolar Planetary Companions" (abstract). Astrophysical Journal 548: L57 – L60. The Astrophysical Journal (abbreviated to ApJ or Astrophys J) is a Scientific journal covering Astronomy and Astrophysics. doi:. A digital object identifier ( DOI) is a permanent identifier given to an Electronic document.
- ^ a b D. E. Trilling, R. H. Brown, A. S. Rivkin (2000). "Circumstellar Dust Disks around Stars with Known Planetary Companions" (abstract). Astrophysical Journal 529: 499 – 505. The Astrophysical Journal (abbreviated to ApJ or Astrophys J) is a Scientific journal covering Astronomy and Astrophysics. doi:. A digital object identifier ( DOI) is a permanent identifier given to an Electronic document.
External links
- SIMBAD star entry, planet entry
- The Extrasolar Planets Encyclopaedia
- entry
- Extrasolar Visions entry
- http://home.xtra.co.nz/hosts/Wingmakers/HD%20210277.html