11066 Sigurd

Last updated

11066 Sigurd
Discovery [1]
Discovered by
Discovery site Palomar Obs.
Discovery date9 February 1992
Designations
(11066) Sigurd
Named after
 Sigurd (Norse mythology) [2]
  • 1992 CC1
  • 1987 GE
Orbital characteristics [1]
Epoch 4 September 2017 (JD  2458000.5)
Uncertainty parameter 0
Observation arc 41.22 yr (15,057 days)
Aphelion 1.9138  AU
Perihelion 0.8691 AU
1.3915 AU
Eccentricity 0.3754
1.64  yr (600 days)
314.05°
0° 36m 1.8s / day
Inclination 36.883°
349.25°
22.006°
Earth  MOID 0.1183 AU (46.1  LD)
Physical characteristics
Dimensions
  • 2.10±0.09 km [5]
  • 2.778±0.115 km [6] [7]
  • 2.86 km(calculated) [4]

    11066 Sigurd (provisional designation 1992 CC1) is a stony contact binary asteroid classified as near-Earth object of the Apollo group of asteroids, approximately 2.5 kilometers in diameter.

    Contents

    It was discovered on 9 February 1992 by American astronomer couple Carolyn and Eugene Shoemaker at Palomar Observatory, California, and named after Sigurd, a hero from Norse mythology. [2] [3]

    Orbit and classification

    Sigurd orbits the Sun in the inner main-belt at a distance of 0.9–1.9  AU once every 1 years and 8 months (600 days). Its orbit has an eccentricity of 0.38 and an inclination of 37° with respect to the ecliptic. [1] A first precovery was taken at the Australian Siding Spring Observatory in 1978, and it was identified as 1987 GE at Palomar in 1987. Both observations remained unused. The body's observation arc begins with its official discovery observation at Palomar in 1992. [3]

    It has an Earth minimum orbital intersection distance of 0.1183 AU (17,700,000 km), which corresponds to 46.1 lunar distances. [1]

    Physical characteristics

    In the SMASS taxonomy, Sigurd is a relatively rare K-type asteroid, which fall into the broader stony S-complex. [1] It has also been grouped into the common S-type asteroid. [13] The ExploreNEOs Warm Spitzer program, using the NASA Infrared Telescope Facility on Mauna Kea Observatory in Hawaii, classifies Sigurd as a Sr-type, which transitions to the R-type asteroids. [12]

    Contact binary

    Radiometric observations at Arecibo Observatory revealed that Sigurd is a contact binary, composed of two lobes in contact with each other. The more or less ellipsoidal lobes are elongated and joined on their long axis. The body has an axial tilt of 50° to 130°. The observing astronomers also note, that more than 10% of all larger (> 200 meters) near-Earth objects observed by radar are such contact binaries. [15]

    Photometry

    Rotational lightcurves obtained from photometric observations by Petr Pravec, Brian Warner and by a group of German and Ukrainian astronomers, gave a well-defined rotation period of 8.4958 to 8.51 hours. The analysis of the constructed lightcurves also gave a high brightness amplitude between 0.97 and 1.15 magnitude, which is indicative that Sigurd has a non-spheroidal shape ( U=3/3/3 ). [8] [9] [10]

    Diameter and albedo

    According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Sigurd measures between 2.10 and 2.778 kilometers in diameter and its surface has an albedo of 0.190 and 0.29, respectively. [5] [6] [7] Observations by the ExploreNEOs survey give a higher albedo of 0.38. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.18 and calculates a diameter of 2.86 kilometers with an absolute magnitude of 15.2, [4] while radiometric observations of Sigurd gave a maximum dimensions of 4.2 kilometers. [15]

    Naming

    This minor planet was named after Sigurd, a legendary hero in Norse mythology. In the Völsunga saga, Sigurd rides through a ring of fire to awaken the shieldmaiden Brynhild ( 123 Brunhild ), and later dies in a fight with Odin ( 3989 Odin ). [2] Sigurd is also known as the dragon-slayer Siegfried in the German poem The Song of the Nibelungs . The approved naming citation was published by the Minor Planet Center on 23 May 2000 ( M.P.C. 40706). [16]

    Related Research Articles

    <span class="mw-page-title-main">1620 Geographos</span> Asteroid

    1620 Geographos is a highly elongated, stony asteroid, near-Earth object and potentially hazardous asteroid of the Apollo group, with a mean diameter of approximately 2.5 km (1.6 mi). It was discovered on 14 September 1951, by astronomers Albert George Wilson and Rudolph Minkowski at the Palomar Observatory in California, United States. The asteroid was named in honor of the National Geographic Society.

    2063 Bacchus, provisional designation 1977 HB, is a stony asteroid and near-Earth object of the Apollo group, approximately 1 kilometer in diameter. The contact binary was discovered on 24 April 1977, by American astronomer Charles Kowal at the Palomar Observatory in California, United States. It was named after Bacchus from Roman mythology.

    <span class="mw-page-title-main">4183 Cuno</span> Asteroid

    4183 Cuno, provisional designation 1959 LM, is an eccentric, rare-type asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, and measures approximately 4 kilometers in diameter.

    4486 Mithra, is an eccentric asteroid and suspected contact-binary, classified as near-Earth object and potentially hazardous asteroid, approximately 2 kilometers in diameter. It belongs to the Apollo group of asteroids and is a relatively slow rotator.

    1068 Nofretete, provisional designation 1926 RK, is a stony asteroid from the background population in the outer asteroid belt, approximately 23 kilometers in diameter. It was discovered on 13 September 1926, by Belgian astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle. The asteroid was named after the Ancient Egyptian Queen Nefertiti by its German name "Nofretete". The near-Earth asteroid 3199 Nefertiti is also named after her.

    <span class="mw-page-title-main">3752 Camillo</span>

    3752 Camillo is an inclined contact-binary asteroid, classified as near-Earth object of the Apollo group, approximately 2.3 kilometers in diameter. It was discovered on 15 August 1985, by astronomers Eleanor Helin and Maria Barucci using a 0.9-metre (35 in) telescope at the CERGA Observatory in Caussols, France. Lightcurve studies by Petr Pravec in 1998 suggest that the assumed S-type asteroid has an elongated shape and a longer-than average rotation period of 38 hours.

    1717 Arlon, provisional designation 1954 AC, is a binary Florian asteroid from the inner regions of the asteroid belt, approximately 8.5 kilometers in diameter.

    <span class="mw-page-title-main">1338 Duponta</span> Stony Florian asteroid and synchronous binary system

    1338 Duponta, provisional designation 1934 XA, is a stony Florian asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 7.8 kilometers in diameter.

    <span class="mw-page-title-main">5143 Heracles</span>

    5143 Heracles is a highly eccentric, rare-type asteroid and synchronous binary system, classified as near-Earth object of the Apollo group, approximately 4.8 kilometers in diameter. The asteroid was discovered on 7 November 1991, by American astronomer Carolyn Shoemaker at Palomar Observatory in California, United States. It is named for the Greek divine hero Heracles. It has an Earth minimum orbit intersection distance of 0.058 AU (8.7 million km) and is associated with the Beta Taurids daytime meteor shower.

    5905 Johnson, provisional designation 1989 CJ1, is a Hungaria asteroid and synchronous binary system from the innermost regions of the asteroid belt, approximately 4 kilometers (2.5 miles) in diameter. It was discovered on 11 February 1989, by American astronomer Eleanor Helin at Palomar Observatory in California, United States. Its satellite measures approximately 1.6 km (1 mi) in diameter and orbits its primary every 21.8 hours. It was named after American astronomer and engineer Lindley N. Johnson.

    3800 Karayusuf, provisional designation 1984 AB, is a Mars-crossing asteroid and suspected binary system from inside the asteroid belt, approximately 2.5 kilometers in diameter. It was discovered on 4 January 1984, by American astronomer Eleanor Helin at the Palomar Observatory in California. The S/L-type asteroid has a short rotation period of 2.2 hours. It was named after Syrian physician Alford Karayusuf, a friend of the discoverer.

    4055 Magellan, provisional designation 1985 DO2, is a bright asteroid and near-Earth object of the Amor group. It is approximately 2.5 kilometers in diameter, and its orbit is moderately eccentric. It was discovered on 24 February 1985, by American astronomer Eleanor Helin at Palomar Observatory in California, United States. It was later named for Portuguese explorer Ferdinand Magellan.

    3066 McFadden, provisional designation 1984 EO, is a stony background asteroid from the central regions of the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 1 March 1984, by American astronomer Edward Bowell at the Anderson Mesa Station near Tucson, Arizona. It was named for American planetary scientist Lucy-Ann McFadden. The assumed S-type asteroid has a rotation period of 13.8 hours.

    3868 Mendoza, provisional designation 4575 P-L is a stony Vestian asteroid and binary system from the inner regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 24 September 1960, by astronomers Cornelis Johannes van Houten, Ingrid van Houten-Groeneveld and Tom Gehrels at Palomar Observatory.

    12923 Zephyr (prov. designation:1999 GK4) is a stony asteroid, classified as potentially hazardous asteroid and near-Earth object of the Apollo group, approximately 2 kilometers (1.2 miles) in diameter. It was discovered on 11 April 1999, by astronomers of the Lowell Observatory Near-Earth Object Search at Anderson Mesa Station near Flagstaff, Arizona. The asteroid was named after the deity Zephyrus from Greek mythology.

    (5645) 1990 SP is an eccentric and tumbling asteroid, classified as near-Earth object of the Apollo group, approximately 1.7 kilometers in diameter. It was discovered on 20 September 1990, by Scottish–Australian astronomer Robert McNaught at the Siding Spring Observatory in Canberra, Australia. Scientists have said that it has a '1 in 364 billion chance' of colliding with the Earth.

    (5646) 1990 TR is a probable rare-type binary asteroid classified as near-Earth object of the Amor group, approximately 2.3 kilometers in diameter. It was discovered on 11 October 1990, by Japanese astronomers Seiji Ueda and Hiroshi Kaneda at Kushiro Observatory near Kushiro, in eastern Hokkaido, Japan.

    21088 Chelyabinsk (provisional designation 1992 BL2) is a stony asteroid and near-Earth object of the Amor group, approximately 4 kilometers in diameter. It was discovered on 30 January 1992, by Belgian astronomer Eric Elst at ESO's La Silla Observatory in northern Chile. The asteroid was named after the Russian city of Chelyabinsk and for its spectacular Chelyabinsk meteor event in 2013. It is not related to the Chelyabinsk impactor.

    (163243) 2002 FB3, provisional designation 2002 FB3, is a stony asteroid on an eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Athen group, approximately 1.6 kilometers (1 mile) in diameter. It was discovered on 18 March 2002, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States. The Q-type asteroid has a rotation period of 6.2 hours.

    <span class="nowrap">(164121) 2003 YT<sub>1</sub></span> Asteroid

    (164121) 2003 YT1, provisional designation 2003 YT1, is a bright asteroid and synchronous binary system on a highly eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 2 kilometers (1.2 miles) in diameter. It was discovered on 18 December 2003, by astronomers with the Catalina Sky Survey at the Catalina Station near Tucson, Arizona, in the United States. The V-type asteroid has a short rotation period of 2.3 hours. Its 210-meter sized minor-planet moon was discovered at Arecibo Observatory in May 2004.

    References

    1. 1 2 3 4 5 6 7 8 "JPL Small-Body Database Browser: 11066 Sigurd (1992 CC1)" (2017-06-22 last obs.). Jet Propulsion Laboratory . Retrieved 5 July 2017.
    2. 1 2 3 Schmadel, Lutz D. (2007). "(11066) Sigurd". Dictionary of Minor Planet Names – (11066) Sigurd. Springer Berlin Heidelberg. p. 751. doi:10.1007/978-3-540-29925-7_8204. ISBN   978-3-540-00238-3.
    3. 1 2 3 "11066 Sigurd (1992 CC1)". Minor Planet Center. Retrieved 5 April 2017.
    4. 1 2 3 4 5 6 "LCDB Data for (11066) Sigurd". Asteroid Lightcurve Database (LCDB). Retrieved 5 April 2017.
    5. 1 2 3 4 Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv: 1606.08923 . Bibcode:2016AJ....152...63N. doi: 10.3847/0004-6256/152/3/63 .
    6. 1 2 3 4 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv: 1109.6407 . Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. S2CID   35447010.
    7. 1 2 3 Mainzer, A.; Grav, T.; Bauer, J.; Masiero, J.; McMillan, R. S.; Cutri, R. M.; et al. (December 2011). "NEOWISE Observations of Near-Earth Objects: Preliminary Results". The Astrophysical Journal. 743 (2): 17. arXiv: 1109.6400 . Bibcode:2011ApJ...743..156M. doi:10.1088/0004-637X/743/2/156. S2CID   239991 . Retrieved 5 April 2017.
    8. 1 2 Pravec, Petr; Wolf, Marek; Sarounová, Lenka (November 1998). "Lightcurves of 26 Near-Earth Asteroids". Icarus. 136 (1): 124–153. Bibcode:1998Icar..136..124P. doi:10.1006/icar.1998.5993 . Retrieved 5 April 2017.
    9. 1 2 Krugly, Yu. N.; Belskaya, I. N.; Shevchenko, V. G.; Chiorny, V. G.; Velichko, F. P.; Mottola, S.; et al. (August 2002). "The Near-Earth Objects Follow-up Program. IV. CCD Photometry in 1996-1999". Icarus. 158 (2): 294–304. Bibcode:2002Icar..158..294K. doi:10.1006/icar.2002.6884 . Retrieved 5 April 2017.
    10. 1 2 Warner, Brian D. (July 2015). "Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2015 January - March". The Minor Planet Bulletin. 42 (3): 172–183. Bibcode:2015MPBu...42..172W. ISSN   1052-8091. PMC   7244166 . PMID   32455355.
    11. ↑ Thomas, C. A.; Trilling, D. E.; Emery, J. P.; Mueller, M.; Hora, J. L.; Benner, L. A. M.; et al. (September 2011). "ExploreNEOs. V. Average Albedo by Taxonomic Complex in the Near-Earth Asteroid Population". The Astronomical Journal. 142 (3): 12. Bibcode:2011AJ....142...85T. doi: 10.1088/0004-6256/142/3/85 .
    12. 1 2 Thomas, Cristina A.; Emery, Joshua P.; Trilling, David E.; Delbó, Marco; Hora, Joseph L.; Mueller, Michael (January 2014). "Physical characterization of Warm Spitzer-observed near-Earth objects". Icarus. 228: 217–246. arXiv: 1310.2000 . Bibcode:2014Icar..228..217T. doi:10.1016/j.icarus.2013.10.004. hdl:2060/20140012047. S2CID   119278697 . Retrieved 5 April 2017.
    13. 1 2 3 Carry, B.; Solano, E.; Eggl, S.; DeMeo, F. E. (April 2016). "Spectral properties of near-Earth and Mars-crossing asteroids using Sloan photometry". Icarus. 268: 340–354. arXiv: 1601.02087 . Bibcode:2016Icar..268..340C. doi:10.1016/j.icarus.2015.12.047. S2CID   119258489 . Retrieved 5 April 2017.
    14. ↑ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 – Preliminary results". Icarus. 261: 34–47. arXiv: 1506.00762 . Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. S2CID   53493339 . Retrieved 5 April 2017.
    15. 1 2 Busch, Michael W.; Ostro, S. J.; Benner, L. A.; Brozovic, M.; Magri, C.; Scheeres, D. J.; et al. (October 2012). "Radar Imaging Of 11066 Sigurd, 2000 YF29, And 2004 XL14 And The Obliquity Distribution Of Contact Binary Near-Earth Asteroids". American Astronomical Society. 44: 302.05. Bibcode:2012DPS....4430205B . Retrieved 5 April 2017.
    16. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 5 April 2017.
    This page is based on this Wikipedia article
    Text is available under the CC BY-SA 4.0 license; additional terms may apply.
    Images, videos and audio are available under their respective licenses.