90377 Sedna

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Sedna ⯲
Sedna seen through Hubble
Sedna as imaged by the Hubble Space Telescope
Discovered biMichael Brown
Chad Trujillo
David Rabinowitz
Discovery dateNovember 14, 2003
MPC designation(90377) Sedna
Named after
2003 VB12
trans-Neptunian object
detached object
Orbital chairactereestics[4]
Epoch 2014-Dec-09.0 (JD 2457000.5)
Aphelion≈ 936 AU (Q)[3]
1.4×1011 km
0.015 ly
Perihelion76.0917±0.0087 AU (q)
1.1423×1010 km
524.4±1.0 AU (a)
7.7576×1010 km
≈ 11400 yr[3][a]
1.04 km/s
144.545° (Ω)
311.29°±0.014° (ω)
Pheesical chairacteristics
Dimensions995±80 km
(thermophysical model)
1060±100 km
(standard thermal model)[6]
10.3 h ± 30%[4][7]
Temperatur≈ 12 K (see note)
Spectral teep
(red) B−V=1.24; V−R=0.78[8]
20.5 (perihelic)[10]

90377 Sedna (seembol: ⯲)[11] is a lairge minor planet in the ooter reaches o the Solar System that wis, as o 2015, at a distance o aboot 86 astronomical units (AU) frae the Sun, aboot three times as far as Neptune.

Notes[eedit | eedit soorce]

  1. Gien the orbital eccentricity o this object, different epochs can generate quite different heliocentric unperturbed twa-body best-fit solutions tae the orbital period. Uisin a 1950 epoch, Sedna haes a 12,100-year period,[2] but uisin a 2010 epoch Sedna haes an 11,800-year period.[4] For objects at such heich eccentricity, the Sun's barycentric coordinates are mair stable nor heliocentric coordinates.[5] Uisin JPL Horizons, the barycentric orbital period is approximately 11,400 years.[3]

References[eedit | eedit soorce]

  1. "Discovery Circumstances: Numbered Minor Planets (90001)–(95000)". IAU: Minor Planet Center. Retrieved 23 Julie 2008.
  2. a b Marc W. Buie (22 November 2009). "Orbit Fit and Astrometric record for 90377". Deep Ecliptic Survey. Retrieved 17 Januar 2006.
  3. a b c Horizons output. "Barycentric Osculating Orbital Elements for 90377 Sedna (2003 VB12)". Retrieved 30 Apryle 2011. (Solution using the Solar System Barycenter and barycentric coordinates. Select Ephemeris Type:Elements and Center:@0) (saved Horizons output file 2011-Feb-04) Archived 2012-11-19 at the Wayback Machine. In the second pane "PR=" can be found, which gives the orbital period in days (4.15E+06, which is ~11400 Julian years).
  4. a b c d "JPL Small-Body Database Browser: 90377 Sedna (2003 VB12)" (2012-10-16 last obs). Retrieved 30 Mairch 2014.
  5. Kaib, Nathan A.; Becker, Andrew C.; Jones, R. Lynne; Puckett, Andrew W.; Bizyaev, Dmitry; Dilday, Benjamin; Frieman, Joshua A.; Oravetz, Daniel J.; Pan, Kaike; Quinn, Thomas; Schneider, Donald P.; Watters, Shannon (2009). "2006 SQ372: A Likely Long-Period Comet from the Inner Oort Cloud". The Astrophysical Journal. 695 (1): 268–275. arXiv:0901.1690. Bibcode:2009ApJ...695..268K. doi:10.1088/0004-637X/695/1/268.CS1 maint: multiple names: authors leet (link)
  6. a b c Pál, A.; Kiss, C.; Müller, T. G.; Santos-Sanz, P.; Vilenius, E.; Szalai, N.; Mommert, M.; Lellouch, E.; Rengel, M.; Hartogh, P.; Protopapa, S.; Stansberry, J.; Ortiz, J. -L.; Duffard, R.; Thirouin, A.; Henry, F.; Delsanti, A. (2012). ""TNOs are Cool": A survey of the trans-Neptunian region. VII. Size and surface characteristics of (90377) Sedna and 2010 EK139". Astronomy & Astrophysics. 541: L6. arXiv:1204.0899. Bibcode:2012A&A...541L...6P. doi:10.1051/0004-6361/201218874.
  7. "Case of Sedna's Missing Moon Solved". Harvard-Smithsonian Center for Astrophysics. 5 Apryle 2005. Retrieved 7 Apryle 2005.
  8. Stephen C. Tegler (26 Januar 2006). "Kuiper Belt Object Magnitudes and Surface Colors". Northern Arizona University. Retrieved 5 November 2006.
  9. "AstDys (90377) Sedna Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 5 Mey 2011.
  10. JPL Horizons On-Line Ephemeris System (18 Julie 2010). "Horizons Output for Sedna 2076/2114". Archived frae the original on 25 Februar 2012. Retrieved 18 Julie 2010. Horizons
  11. U+2BF2 ⯲. David Faulks (2016) 'Eris and Sedna Symbols,' L2/16-173R, Unicode Technical Committee Document Register.