(42301) 2001 UR163: Difference between revisions

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|last-author-amp=yes
|last-author-amp=yes
|url=http://www.astronomia.edu.uy/dwarfplanet/list.html
|url=http://www.astronomia.edu.uy/dwarfplanet/list.html
|accessdate=2010-09-22}} [http://www.lpi.usra.edu/meetings/acm2008/pdf/8261.pdf (Which are the dwarfs in the Solar System?)]</ref> that resides in the [[scattered disc]]. It was discovered on October 21, 2001 by the [[Deep Ecliptic Survey]] (DES) program at Kitt Peak. Light-curve-amplitude analysis shows only small deviations, suggesting that {{mp|(42301) 2001 UR|163}} is a spheroid with small albedo spots.<ref name=SSDwarfs>Tancredi, G., & Favre, S. (2008) [http://www.lpi.usra.edu/meetings/acm2008/pdf/8261.pdf ''Which are the dwarfs in the Solar System?'']. Depto. Astronomía, Fac. Ciencias, Montevideo, Uruguay; Observatorio Astronómico Los Molinos, MEC, Uruguay. Retrieved 10-08-2011</ref> [[Michael E. Brown|Michael Brown]]'s website lists it as a highly likely dwarf planet, but the diameter of the object has never been measured.<ref name="Brown-dplist">{{cite web
|accessdate=2010-09-22}} [http://www.lpi.usra.edu/meetings/acm2008/pdf/8261.pdf (Which are the dwarfs in the Solar System?)]</ref> that resides in the [[scattered disc]]. It was discovered on October 21, 2001 by the [[Deep Ecliptic Survey]] (DES) program at Kitt Peak. Light-curve-amplitude analysis shows only small deviations, suggesting that {{mp|(42301) 2001 UR|163}} is a spheroid with small albedo spots.<ref name=SSDwarfs>Tancredi, G., & Favre, S. (2008) [http://www.lpi.usra.edu/meetings/acm2008/pdf/8261.pdf ''Which are the dwarfs in the Solar System?'']. Depto. Astronomía, Fac. Ciencias, Montevideo, Uruguay; Observatorio Astronómico Los Molinos, MEC, Uruguay. Retrieved 10-08-2011</ref> [[Michael E. Brown|Michael Brown]]'s website lists it as a highly likely dwarf planet, but the diameter of the object has never been measured.<ref name="Brown-dplist" />
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|title=How many dwarf planets are there in the outer solar system? (updates daily)
⚫
|publisher=California Institute of Technology
⚫
|author=Michael E. Brown
⚫
|author-link=Michael E. Brown
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|url=http://www.gps.caltech.edu/~mbrown/dps.html
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|accessdate=2011-08-25}}</ref>


{{mp|(42301) 2001 UR|163}} has the reddest [[color index]] of any object in the Solar System. On October 31, 2002, the 3.6-meter [[Canada–France–Hawaii Telescope]] observed {{mp|(42301) 2001 UR|163}} set a record red reading of B−R=2.28. This makes {{mp|(42301) 2001 UR|163}} even redder than [[5145 Pholus]], {{mpl|(119070) 2001 KP|77}}, [[90377 Sedna]] and comet [[C/2001 T4]].
{{mp|(42301) 2001 UR|163}} has the reddest [[color index]] of any object in the Solar System. On October 31, 2002, the 3.6-meter [[Canada–France–Hawaii Telescope]] observed {{mp|(42301) 2001 UR|163}} set a record red reading of B−R=2.28. This makes {{mp|(42301) 2001 UR|163}} even redder than [[5145 Pholus]], {{mpl|(119070) 2001 KP|77}}, [[90377 Sedna]] and comet [[C/2001 T4]].
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It came to [[apsis|perihelion]] around 1937.<ref name="jpldata"/> In 2006, it moved beyond 50&nbsp;[[Astronomical unit|AUえーゆー]] from the Sun. It is currently 51.9&nbsp;AUえーゆー from the Sun.<ref name="AstDyS"/>
It came to [[apsis|perihelion]] around 1937.<ref name="jpldata"/> In 2006, it moved beyond 50&nbsp;[[Astronomical unit|AUえーゆー]] from the Sun. It is currently 51.9&nbsp;AUえーゆー from the Sun.<ref name="AstDyS"/>


==See also==
== See also ==
*[[List of Solar System objects most distant from the Sun in 2015]]
* [[List of Solar System objects most distant from the Sun in 2015]]


==References==
== References ==
{{reflist
{{Reflist|30em}}
|refs=

<ref name="Brown-dplist">{{cite web
⚫
|title = How many dwarf planets are there in the outer solar system? (updates daily)
⚫
|publisher = California Institute of Technology
⚫
|author = Michael E. Brown
⚫
|author-link= Michael E. Brown
⚫
|url = http://web.gps.caltech.edu/~mbrown/dps.html
⚫
|accessdate = 31 August 2016}}</ref>

}} <!-- end of reflist -->


==External links==
==External links==

Revision as of 16:33, 31 August 2016

(42301) 2001 UR163
Discovery[1]
Discovered byKitt Peak (695)
Discovery date21 October 2001
Designations
(42301) 2001 UR163
TNO (SDO)[2]
4:9 resonance[3]
Orbital characteristics[4]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc9591 days (26.26 yr)
Aphelion65.876 AUえーゆー (9.8549 Tm)
Perihelion36.825 AUえーゆー (5.5089 Tm)
51.351 AUえーゆー (7.6820 Tm)
Eccentricity0.28287
367.98 yr (134405 d)
4.07 km/s
77.675°
0° 0m 9.643s / day
Inclination0.75238°
302.085°
342.203°
Earth MOID35.807 AUえーゆー (5.3567 Tm)
Jupiter MOID31.6187 AUえーゆー (4.73009 Tm)
Physical characteristics
Dimensions636 km (assumed)[5]
0.09? (assumed)
Temperature≈39 K
(Super red; highest B−R)
B−V=1.44; V−R=0.84;
B−R=2.28
21.3[6]
4.5[4]

(42301) 2001 UR163, also written as (42301) 2001 UR163, is likely a dwarf planet[7] that resides in the scattered disc. It was discovered on October 21, 2001 by the Deep Ecliptic Survey (DES) program at Kitt Peak. Light-curve-amplitude analysis shows only small deviations, suggesting that (42301) 2001 UR163 is a spheroid with small albedo spots.[8] Michael Brown's website lists it as a highly likely dwarf planet, but the diameter of the object has never been measured.[9]

(42301) 2001 UR163 has the reddest color index of any object in the Solar System. On October 31, 2002, the 3.6-meter Canada–France–Hawaii Telescope observed (42301) 2001 UR163 set a record red reading of B−R=2.28. This makes (42301) 2001 UR163 even redder than 5145 Pholus, (119070) 2001 KP77, 90377 Sedna and comet C/2001 T4.

Reddening of the spectrum is caused by cosmic irradiation by ultraviolet radiation and charged particles. Becoming bluer in the spectrum is caused by impact collisions exposing the interior of an object. In the visible spectrum, (42301) 2001 UR163 would appear orange-brown, depending on its albedo.

It came to perihelion around 1937.[4] In 2006, it moved beyond 50 AUえーゆー from the Sun. It is currently 51.9 AUえーゆー from the Sun.[6]

See also

References

  1. ^ Marsden, Brian G. (2001-11-14). "MPEC 2001-V57: 2001 QX322, 2001 UR163, 2001 VN71". IAU Minor Planet Center. Harvard-Smithsonian Center for Astrophysics. Retrieved 2010-01-06. (K01UG3R*)
  2. ^ "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. Retrieved 2008-09-25.
  3. ^ Marc W. Buie (2003-10-23). "Orbit Fit and Astrometric record for 42301". SwRI (Space Science Department). Retrieved 2008-09-25.
  4. ^ a b c "JPL Small-Body Database Browser: 42301 (2001 UR163)" (2003-10-23 last obs). Retrieved 5 April 2016.
  5. ^ Wm. Robert Johnston. "List of Known Trans-Neptunian Objects". Johnston's Archive. Archived from the original on 24 June 2009. Retrieved 2009-08-28.
  6. ^ a b "AstDyS (42301) 2001UR163 Ephemerides". Department of Mathematics, University of Pisa, Italy. Archived from the original on 2009-04-18. Retrieved 2009-03-19.
  7. ^ Gonzalo Tancredi; Sofía Favre (October 13, 2008). "Dwarf Planet & Plutoid Headquarters". Portal Uruguayo de Astronomía. Retrieved 2010-09-22. {{cite web}}: Unknown parameter |last-author-amp= ignored (|name-list-style= suggested) (help) (Which are the dwarfs in the Solar System?)
  8. ^ Tancredi, G., & Favre, S. (2008) Which are the dwarfs in the Solar System?. Depto. Astronomía, Fac. Ciencias, Montevideo, Uruguay; Observatorio Astronómico Los Molinos, MEC, Uruguay. Retrieved 10-08-2011
  9. ^ Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 31 August 2016.

External links


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