206P/Barnard–Boattini

206P/Barnard–Boattini was the first comet to be discovered by photographic means.[5] The American astronomer Edward Emerson Barnard did so on the night of October 13, 1892.

After this apparition this comet was lost and was thus designated D/1892 T1.

Ľuboš Neslušan (Astronomical Institute of the Slovak Academy of Sciences) suggests that 14P/Wolf and this comet are siblings which stem from a common parent comet.[6]

This comet was rediscovered on October 7, 2008 by Andrea Boattini in the course of the Mt. Lemmon Survey. It was initially credited to Boattini before it was identified as Comet Barnard 3.[5] The comet passed 0.1904 AU (28,480,000 km; 17,700,000 mi) from Earth on October 21, 2008.[1] The comet has made 20 revolutions since 1892 and passed within 0.3–0.4 AU of Jupiter in 1922, 1934 and 2005.[7][8]

It was not seen during the 2014 perihelion passage because when the faint comet was at the brightest it was only 75 degrees from the Sun. It has not been seen since January 2009.[4] The comet passed 0.1303 AU (19,490,000 km; 12,110,000 mi) from Jupiter on July 9, 2017.[1]

The comet has an Earth-MOID of 0.018 AU (2,700,000 km; 1,700,000 mi).[1]

206P/Barnard–Boattini
Discovery
Discovery dateOctober 13, 1892
Alternative
designations
Barnard 3;
D/1892 T1; P/1892 T1;
1892e; 1892 V;
P/2008 T3
Orbital characteristics A
Epoch2000-Mar-03.00
(JD 2451606.5)[1]
Aphelion5.30856 AU
Perihelion0.97881 AU
Semi-major axis3.143688 AU
Eccentricity0.688642
Orbital period5.5740 a
Inclination31.9741°
Earth MOID0.018 AU (2,700,000 km)[1]
Last perihelionAugust 27, 2014[2][3]
October 25, 2008
Next perihelionMarch 4, 2021[4]

References

  1. ^ a b c d e "JPL Small-Body Database Browser: 206P/Barnard-Boattini" (last observation: 2009-01-04). Jet Propulsion Laboratory. Retrieved 2016-01-10.
  2. ^ Syuichi Nakano (2009-03-18). "206P/Barnard-Boattini (NK 1752)". OAA Computing and Minor Planet Sections. Retrieved 2012-02-25.
  3. ^ 206P/Barnard-Boattini at Kazuo Kinoshita's home page
  4. ^ a b "206P/Barnard-Boattini Orbit". Minor Planet Center. Retrieved 2016-01-10.
  5. ^ a b 206P at Garry Kronk’s Cometography Archived September 25, 2010, at the Wayback Machine
  6. ^ Ľuboš Neslušan, Comets 14P/Wolf and D/1892 T1 as parent bodies of a common, alpha-Capricornids related, meteor stream Astronomy and Astrophysics, vol. 351, pp. 752–758 (1999) PDF
  7. ^ IAUC 8995 Archived July 19, 2011, at the Wayback Machine
  8. ^ The COCD Homepage: News – October 2008

External links

Numbered comets
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205P/Giacobini
206P/Barnard–Boattini Next
207P/NEAT
177P/Barnard

Comet 177P/Barnard, also known as Barnard 2, is a periodic comet with an orbital period of 119 years. It fits the classical definition of a Halley-type comet with (20 years < period < 200 years).The comet, also designated P/2006 M3, was discovered by Edward Emerson Barnard on June 24, 1889, and was re-discovered after 116 years. On July 19, 2006, 177P came within 0.36 AU of the Earth. From late July through September 2006 it was brighter than expected at 8th magnitude in the constellations Hercules and then Draco. Perihelion was August 28, 2006.

Of Barnard's other two periodic comets, the first, D/1884 O1 (Barnard 1) was last seen on November 20, 1884, and is thought to have disintegrated. The last, 206P/Barnard-Boattini marked the beginning of a new era in cometary astronomy, as it was the first to be discovered by photography. It was a lost comet after 1892, until accidentally rediscovered on October 7, 2008, by Andrea Boattini.

1892 V

1892 V may refer to:

206P/Barnard–Boattini, comet

351 Yrsa, asteroid

276P/Vorobjov

276P/Vorobjov (previously P/2012 T7 (VOROBJOV)) is a Jupiter-family comet discovered on 15 October 2012 by Tomáš Vorobjov on three 120-s images taken remotely using the 0.81-m f/7 Ritchey-Chretien Schulman Telescope located at the Mt. Lemmon SkyCenter via the Sierra Stars Observatory Network in the course of a minor-planet search survey undertaken as part of the International Astronomical Search Collaboration (IASC) school campaigns. After posting on the Minor Planet Center's NEOCP webpage, other observers have commented on the object's cometary appearance. The discovery was announced by the Minor Planet Center on 18 October, three days after the discovery.

Andrea Boattini

Andrea Boattini (born 16 September 1969) is an Italian astronomer and a prolific discoverer of minor planets and comets.

C/2012 E2 (SWAN)

Comet C/2012 E2 (SWAN) was a Kreutz group sungrazing comet discovered by Vladimir Bezugly in publicly available images taken by the SWAN instrument (Solar Wind ANisotropies) on board the SOHO spacecraft. It is recognized for being the first Kreutz sungrazer observed in SWAN imagery.

C/2015 F3

Comet C/2015 F3 (SWAN) was discovered in March 2015 by Rob Matson, Vladimir Bezugly and Michael Matiazzo in near real time images taken by the SWAN instrument aboard the SOHO spacecraft. At discovery the comet was already shining at around 10th magnitude as it was already near perihelion

. Orbital studies revealed C/2015 F3 to be a related fragment to long periodic comets C/1988 A1 (Liller) and C/1996 Q1 (Tabur), which were already thought to have broken off each other at a previous perihelion passage. As of May 2015, Comet SWAN was fading rapidly, as both C/1988 A1 and C/1996 Q1 ultimately did. .

C/2015 F5 (SWAN-XingMing)

Comet C/2015 F5 (SWAN-XingMing) was discovered on March 29, 2015 in near real time SWAN images of the SOHO spacecraft, by Szymon Liwo and Worachate Boonplod. It was also independently discovered on April 4, 2015 by Guoyou Sun and Gao Xing at the XingMing observatory near Ürümqi, China. At discovery, the comet had just passed perihelion and was only 0,35 AU from the Sun, shining at about +10 mag. As of May 2015 the comet had faded below mag +13. The comet is periodic with an orbital period of about 61 years .

Edward Emerson Barnard

Edward Emerson Barnard (December 16, 1857 – February 6, 1923) was an American astronomer. He was commonly known as E. E. Barnard, and was recognized as a gifted observational astronomer. He is best known for his discovery of the high proper motion of Barnard's Star in 1916, which is named in his honor.

List of numbered comets

This is a list of periodic comets that were numbered by the Minor Planet Center after having been observed on at least two occasions. As of October 2018 there are 375 numbered comets (1P–375P), most of them being members of the Jupiter-family (JFC). There are also 27 Encke-type comets (ETCs), 14 Halley-type comets (HTCs), 4 Chiron-type comets (CTCs), and one long-period comet (i.e. 153P). Many of these bodies are also near-Earth comets (NECs). In addition, 8 numbered comets are principally classified as minor planets – five main-belt comets, two centaurs (CEN), and one Apollo asteroid – and display characteristics of both an asteroid and a comet.

Occasionally, comets will break up into multiple chunks, as volatiles coming off the comet may cause it to break into two or more pieces. An extreme example of this is 73P/Schwassmann–Wachmann, which broke into over 50 pieces during its 1995 perihelion.

For a larger list of periodic Jupiter-family and Halley-type comets including unnumbered bodies, see list of periodic comets.

Lost comet

A comet is "lost" when it has been missed at its most recent perihelion passage. This generally happens when data is insufficient to reliably calculate the comet's orbit and predict its location. The D/ designation is used for a periodic comet that no longer exists or is deemed to have disappeared.Lost comets can be compared to lost minor planets, although calculation of comet orbits differs because of nongravitational forces, such as emission of jets of gas from the nucleus. Some astronomers have specialized in this area, such as Brian G. Marsden, who successfully predicted the 1992 return of the once-lost periodic comet Swift–Tuttle.

Mount Lemmon Survey

Mount Lemmon Survey (MLS) is a part of the Catalina Sky Survey with observatory code G96. MLS uses a 1.52 m (60 in) cassegrain reflector telescope operated by the Steward Observatory at Mount Lemmon Observatory, which is located at 2,791 meters (9,157 ft) in the Santa Catalina Mountains northeast of Tucson, Arizona.

It is currently one of the most prolific surveys worldwide, especially for discovering near-Earth objects. MLS ranks among the top discoverers on the Minor Planet Center's discovery chart with a total of more than 50 thousand numbered minor planets.

Potentially hazardous object

A potentially hazardous object (PHO) is a near-Earth object – either an asteroid or a comet – with an orbit that can make exceptionally close approaches to the Earth and large enough to cause significant regional damage in the event of impact.Most of these objects are potentially hazardous asteroids (PHAs), defined as having a minimum orbital intersection distance with Earth of less than 0.05 astronomical units (19.5 lunar distances) and an absolute magnitude of 22 or brighter. As of January 2018 there are 1,885 known PHAs (about 11% of the total near-Earth population), of which 157 are estimated to be larger than one kilometer in diameter (see list of largest PHAs below). Most of the discovered PHAs are Apollo asteroids (1,601) and fewer belong to the group of Aten asteroids (169).A potentially hazardous object can be known not to be a threat to Earth for the next 100 years or more, if its orbit is reasonably well determined. Potentially hazardous asteroids with some threat of impacting Earth in the next 100 years are listed on the Sentry Risk Table. Potentially hazardous asteroids are normally only a hazard on a time scale of hundreds of years as the known orbit becomes more divergent. After several astronomical surveys, the number of known PHAs has increased tenfold since the end of the 1990s (see bar charts below). The Minor Planet Center's website List of the Potentially Hazardous Asteroids also publishes detailed information for these objects.

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