(528381) 2008 ST291

Last updated

(528381) 2008 ST291
2008 ST291-orbit.png
Orbit of (528381) 2008 ST291
Discovery [1] [2]
Discovered by M. E. Schwamb
M. E. Brown
D. L. Rabinowitz
Discovery site Palomar Obs.
Discovery date24 September 2008
Designations
(528381) 2008 ST291
2008 ST291
TNO  · SDO
res 1:6 [3]
Orbital characteristics [4]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 3
Observation arc 9.27 yr (3,385 d)
Aphelion 157.437 AU (23.5522 Tm)
Perihelion 42.3114440 AU (6.32970193 Tm)
99.8742972 AU (14.94098220 Tm)
Eccentricity 0.5763530
998.30 yr (364,629 d)
23.349°
0° 0m 3.6s / day
Inclination 20.758°
330.97°
324.65°
Physical characteristics
Mean diameter
549  km (est.) [5]
584 km(est.) [3]
612 km [6] [7] [lower-alpha 1]
345–773 km [7] [lower-alpha 2]
0.09 (assumed) [3] [5]
22.24 [6]
4.4 [1] [4]
4.3 [6]
4.6 [5]

    (528381) 2008 ST291, provisional designation 2008 ST291, is a 1:6 resonant trans-Neptunian object located in the outermost region of the Solar System that takes almost a thousand years to complete an orbit around the Sun. [5] It was discovered on 24 September 2008 by American astronomers Megan Schwamb, Michael Brown and David Rabinowitz at the Palomar Observatory in California, with no known earlier precovery images. [1]

    Contents

    Numbering and naming

    This minor planet was numbered by the Minor Planet Center on 18 May 2019 ( M.P.C. 114657). [8] As of 2019, it has not been named. [1]

    Orbit and classification

    Orbit comparison of 2008 ST291, Pluto and Neptune 2008ST291-orbit.png
    Orbit comparison of 2008 ST291, Pluto and Neptune

    2008 ST291 is located at the 1:6 Neptune resonance of 99 AU meaning that it completes roughly 1 orbit for every 6 orbits Neptune makes. [3] It orbits the Sun at a distance of 42.3–157.5  AU once every 998 years and 4 months (semi-major axis of 99.89 AU). Its orbit has an eccentricity of 0.58 and an inclination of 21° with respect to the ecliptic. [4] Currently located at 60.9  AU from the Sun, [6] the object came to perihelion in 1954. [4]

    Physical characteristics

    Based on an absolute magnitude of 4.4, [1] 2008 ST291 is estimated by the Johnston's Archive to be about 584 kilometres (363 mi) in diameter, assuming a typical albedo of 0.09 for trans-Neptunian objects. [3] Astronomer Mike Brown estimates a slightly smaller 549 km from the same albedo and a fainter 4.6 magnitude. [5] The Asteroid Dynamic Site records a brighter 4.3 magnitude, which calculates to 612 km using the same albedo (and same formula as Johnston's); using the average of these magnitudes and a standard assumed minor planet albedo range of 0.25 ~ 0.05, possible sizes of 345 to 773 km are produced.

    See also

    Notes

    1. ↑ Based on AstDyS magnitude and same 0.09 albedo as Brown and Johnston, using Bruton formula
    2. ↑ Based on averaged magnitude of 4.433 and typically assumed minor planet albedo range of 0.05 ~ 0.25, using Bruton formula

    Related Research Articles

    <span class="nowrap">(612911) 2004 XR<sub>190</sub></span> Minor planet in the scattered disc

    (612911) 2004 XR190, nicknamed Buffy, is a trans-Neptunian object, classified as both a scattered disc object and a detached object, located in the outermost region of the Solar System. It was first observed on 11 December 2004, by astronomers with the Canada–France Ecliptic Plane Survey at the Mauna Kea Observatories, Hawaii, United States. It is the largest known highly inclined (> 45°) object. With a perihelion of 51 AU, it belongs to a small and poorly understood group of very distant objects with moderate eccentricities.

    (119070) 2001 KP77, provisional designation:2001 KP77, is a resonant trans-Neptunian object in the Kuiper belt, a circumstellar disc located in the outermost region of the Solar System. It was discovered on 23 May 2001, by American astronomer Marc Buie at the Cerro Tololo Observatory in Chile. The object is locked in a 4:7 orbital resonance with Neptune. It has a red surface color and measures approximately 176 kilometers (110 miles) in diameter. As of 2021, it has not been named.

    <span class="nowrap">(42301) 2001 UR<sub>163</sub></span>

    (42301) 2001 UR163, prov. designation: 2001 UR163, is a resonant trans-Neptunian object and possible dwarf planet located in the outermost region of the Solar System. The object measures approximately 352 kilometers (220 miles) in diameter with a high albedo and stays in an uncommon orbital resonance (4:9) with Neptune. It was discovered on 21 October 2001 by astronomers of the Deep Ecliptic Survey program at Kitt Peak National Observatory near Tucson, Arizona, United States. As of 2021, it has not been named.

    (118228) 1996 TQ66, prov. designation:1996 TQ66, is a resonant trans-Neptunian object of the plutino population in the Kuiper belt, located in the outermost region of the Solar System. It was discovered on 8 October 1996, by American astronomers Jun Chen, David Jewitt, Chad Trujillo and Jane Luu, using the UH88 telescope at the Mauna Kea Observatories, Hawaii. The very red object measures approximately 185 kilometers (110 miles) in diameter. As of 2021, it has not been named.

    (91205) 1998 US43, provisional designation 1998 US43, is a resonant trans-Neptunian object of the plutino group, located in the Kuiper belt in the outermost region of the Solar System. The rather bluish body measures approximately 111 kilometers (69 miles) in diameter. It was discovered on 22 October 1998, by American astronomer Marc Buie at the Kitt Peak National Observatory in the United States. It is probably not a dwarf planet candidate.

    <span class="nowrap">2006 QH<sub>181</sub></span>

    2006 QH181, also written as 2006 QH181, is a trans-Neptunian object (TNO) in the scattered disc. Its orbit is currently too poorly determined (U=6) to know whether it is in a resonance with Neptune.

    (35671) 1998 SN165, prov. designation: 1998 SN165, is a trans-Neptunian object from the Kuiper belt located in the outermost region of the Solar System. It was discovered on 23 September 1998, by American astronomer Arianna Gleason at the Kitt Peak National Observatory near Tucson, Arizona. The cold classical Kuiper belt object is a dwarf planet candidate, as it measures approximately 400 kilometers (250 miles) in diameter. It has a grey-blue color (BB) and a rotation period of 8.8 hours. As of 2021, it has not been named.

    (523639) 2010 RE64, provisional designation 2010 RE64, is a trans-Neptunian object in the scattered disc located in the outermost region of the Solar System, approximately 570 kilometers (350 miles) in diameter. It was discovered on 11 July 2010 by the Pan-STARRS-1 survey at the Haleakala Observatory, Hawaii, in the United States.

    (589683) 2010 RF43, provisionally designated: 2010 RF43, is a large trans-Neptunian object orbiting in the scattered disc in the outermost regions of the Solar System. The object was discovered on 9 September 2010, by American astronomers David Rabinowitz, Megan Schwamb and Suzanne Tourtellotte at ESO's La Silla Observatory in northern Chile.

    (524435) 2002 CY248, provisional designation 2002 CY248, is a trans-Neptunian object and weak dwarf-planet candidate from the classical Kuiper belt in the outermost region of the Solar System, approximately 400–450 kilometers (250–280 mi) in diameter. It was first observed on 6 February 2002, by American astronomer Marc Buie at the Kitt Peak National Observatory in Arizona, United States.

    (445473) 2010 VZ98, provisional designation 2010 VZ98, is a trans-Neptunian object of the scattered disc, orbiting the Sun in the outermost region of the Solar System. It has a diameter of approximately 400 kilometers.

    (523643) 2010 TY53, provisional designation 2010 TY53 is a trans-Neptunian object and possible centaur located in the outermost region of the Solar System. With an absolute magnitude of 5.7, it approximately measures 325 kilometers (200 miles) in diameter. It was discovered on 4 August 2010 by the Pan-STARRS-1 survey at the Haleakala Observatory, Hawaii, in the United States. According to American astronomer Michael Brown, it is "possibly" a dwarf planet.

    (523671) 2013 FZ27, provisional designation 2013 FZ27, is a trans-Neptunian object located in the Kuiper belt in the outermost region of the Solar System, approximately 570 kilometers (350 miles) in diameter. It was discovered on 16 March 2013, by American astronomers Scott Sheppard and Chad Trujillo at the CTIO in Chile. Numbered in 2018, this minor planet has not been named.

    (523692) 2014 EZ51, prov. designation: 2014 EZ51, is a large trans-Neptunian object in the scattered disc, approximately 700 kilometres (430 miles) in diameter. It was discovered on 18 April 2010, by the Pan-STARRS 1 survey at Haleakala Observatory, Hawaii, United States.

    (505478) 2013 UT15 is an extreme trans-Neptunian object from the scattered disc, located in the outermost regions of the Solar System, approximately 260 kilometers (160 miles) in diameter. It was discovered on 2 August 2013, by astronomers of the Outer Solar System Origins Survey at Mauna Kea Observatory, Hawaii, United States.

    (527603) 2007 VJ305, provisional designation 2007 VJ305, is an extrem trans-Neptunian object from the extended scattered disc on a highly eccentric orbit in the outermost region of the Solar System. It measures approximately 250 kilometers (160 miles) in diameter and is "possibly" a dwarf planet. The rather reddish extended scattered disc object belongs to the group of extreme trans-Neptunian objects. It was discovered on 4 November 2007 by astronomers Andrew Becker, Andrew Puckett and Jeremy Kubica at the Apache Point Observatory in New Mexico, United States.

    (543354) 2014 AN55 (prov. designation:2014 AN55) is a trans-Neptunian object in the scattered disc, located in the outermost region of the Solar System, that measures approximately 600 kilometres (370 mi) in diameter. It was discovered on 25 January 2014, by astronomers with the Pan-STARRS survey at Haleakala Observatory on the island of Maui, Hawaii, in the United States.

    (523635) 2010 DN93, provisional designation 2010 DN93, is a trans-Neptunian object from in the scattered disc located in the outermost region of the Solar System. It was discovered on 26 February 2010, by astronomers with the Pan-STARRS survey at Haleakala Observatory on the island of Maui, Hawaii, in the United States. Assuming a low albedo, the object is estimated at approximately 490 kilometers (300 miles) in diameter. It was numbered in 2018 and remains unnamed.

    (523702) 2014 HW199, provisional designation 2014 HW199, is a trans-Neptunian object from the classical Kuiper belt, located in the outermost region of the Solar System. It was discovered on 30 January 2011, by astronomers with the Pan-STARRS survey at Haleakala Observatory, Hawaii, United States. The classical Kuiper belt object is also a dwarf planet candidate, as it measures approximately 290 kilometers (180 miles) in diameter.

    (495603) 2015 AM281, provisional designation 2015 AM281, is a resonant trans-Neptunian object in the outermost region of the Solar System, guesstimated at approximately 470 kilometers (290 miles) in diameter. It was discovered on 13 March 2010, by astronomers with the Pan-STARRS survey at Haleakala Observatory, Hawaii, United States.

    References

    1. 1 2 3 4 5 "(528381) 2008 ST291". Minor Planet Center. Retrieved 29 May 2019.
    2. ↑ "MPEC 2009-V68 : 2008 ST291". Minor Planet Center. 14 November 2009. Retrieved 29 May 2019.
    3. 1 2 3 4 5 Johnston, Wm. Robert (25 May 2019). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 29 May 2019.
    4. 1 2 3 4 "JPL Small-Body Database Browser: (2008 ST291)" (2017-12-31 last obs.). Jet Propulsion Laboratory . Retrieved 29 May 2019.
    5. 1 2 3 4 5 Brown, Michael E. "How many dwarf planets are there in the outer solar system?". California Institute of Technology . Retrieved 29 May 2019.
    6. 1 2 3 4 "2008 ST291 – Ephemerides". AstDyS-2, Asteroids – Dynamic Site. Retrieved 19 August 2019.
    7. 1 2 Dan Bruton. "Conversion of Absolute Magnitude to Diameter for Minor Planets". Stephen F. Austin State University, College of Sciences and Mathematics, Department of Physics, Engineering and Astronomy. Archived from the original on 23 July 2011. Retrieved 15 August 2019.
    8. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 29 May 2019.
    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.