(709487) 2013 BL76

Trans-Neptunian object February 2018 yes (709487) 2013 BL 76 #C2E0FF Celestia distant object orbits.png The orbits of some of the most distant minor planets, 2013 BL 76 at top left 20 January 2013 Mt. Lemmon Survey (709487) 2013 BL 76 TNO Centaur (DES)  damocloid distant 4 September 2017 (JD 2458000.5) 1 1.88 yr (687 days) 2151.77 AU ~1920 AU 8.3622 AU 1080.07 AU ~964 AU 0.9923 35,496 yr (12,965,058 d) ~29900 yr last perihelion: 2012-10-27 0.0493° 0.0000 ms / day 98.613° 180.20° 165.96° ~15–40 km 30–40 km (at 0.1–0.05) 22.1 10.8 (709487) 2013 BL 76 is a trans-Neptunian object and centaur from the scattered disk and Inner Oort cloud approximately 30 kilometers in diameter. Using an epoch of February 2017, it is the minor planet with the 5th largest heliocentric semi-major axis in the Solar System (larger ones include 2014 FE 72, 2012 DR 30, and 2005 VX 3). 2013 BL 76 has a barycentric semi-major axis of ~964 AU,Given the orbital eccentricity of this object, different epochs can generate quite different heliocentric unperturbed two-body best-fit solutions to the semi-major axis and orbital period. For objects at such high eccentricity, the Sun's barycenter is more stable than a heliocentric solution. Using JPL Horizons, the barycentric semi-major axis is approximately 964 AU. footnoteA lower-alpha which is the third largest barycentric semi-major axis of any minor planet. Possible comet With an absolute magnitude (H) of 10.8 and an unknown albedo, the object has an estimated diameter of 15–40 km. Since it has not been seen out-gassing, it is not known if it is a comet or not. It might also be a damocloid, a type of minor planet that was originally a comet but lost most of its near-surface volatile materials after numerous orbits around the Sun. It also might be a dormant comet that simply has not been seen outgassing. Orbit 2013 BL 76 came to perihelion 8.3 AU from the Sun on 27 October 2012, when it reached an apparent magnitude of about 20. In 1927, when it was 100 AU from the Sun, it had an apparent magnitude of about 30.8. For comparison, the dwarf planet Sedna had an apparent magnitude of 21.7 when it was 100 AU from the Sun. It comes to opposition at the start of September. It will not be 50 AU from the Sun until 2045. After leaving the planetary region of the Solar System, 2013 BL 76 will have a barycentric aphelion of 1920 AU with an orbital period of 29900 years. The orbit of 2013 BL 76 currently comes closer to Saturn than any of the other giant planets. In a 10 million year integration of the orbit, the nominal (best-fit) orbit acquires a perihelion point of 0.5 AU (inside the orbit of Venus), and one of the 3-sigma clones acquires a perihelion point of only 0.008 AU km on on. 2013 BL 76 travels in a technically retrograde orbit around the Sun. It is actually orbiting in a plane nearly perpendicular to that of the ecliptic. It has the 55th highest inclination of any known asteroid, after 2010 GW 147 and before 2014 HS 150. Comparison thumb|center|500px|The orbits of Sedna, 2012 VP 113, Leleākūhonua, and other very distant objects along with the predicted orbit of Planet Nine. The three sednoids (pink) along with the red-colored extreme trans-Neptunian object (eTNO) orbits are suspected to be aligned with the hypothetical Planet Nine while the blue-colored eTNO orbits are anti-aligned. The highly elongated orbits colored brown include centaurs and damocloids with large aphelion distances over 200 AU. + Orbital evolution Epoch BarycentricAphelion (Q)(AU) Orbitalperiodyr 1950 1849 28300 2050 1920 29900 left Largest semimajor axes of minor planets Similar bodies Minor planet desig. Semi-majoraxis Semi-majoraxis(bary barycentric) Perihelion Aphelion Aphelion(bary barycentric) Abs.mag. Absolute magnitude(H) Diameter(km) Orb.uncert. Orbital uncertainty(0–9)0–3 is high-certainty and well constrained, 9 is low-certainty and probably lost. No. Number of obs.(arc days) 2002 GB 32 213 206.7 35.3420 390 378 7.8 (7.7) 120 3 026 26 (4733) (82158) 2001 FP 185 220 216 34.2340 406 398 6.0 265 3 050 50 (2461) 2012 KA 51 224 190 4.9 444 380 11.1 15 9 012 12 (6) (148209) 2000 CR 105 229.8 222.2 44.2000 415.5 400.4 6.3 320 3 054 54 (3242) (468861) 2013 LU 28 230 230 8.698 460 451.5 7.9 115 5 056 56 (385) 2006 UL 321 261 257 23.5 498 490.5 7.6 125 9 003 3 (1) 2012 VP 113 265 263.158 80.4500 448 445.88 4.0 460 5 026 26 (739) 1996 PW 267 240 2.5557 532 480 14.0 7 2 250 250 (506) 2011 OR 17 (2010 KZ 127) 272 270 3.0987 550 540 13.1 10 1 101 101 (748) 2013 RF 98 320 316.7 36.288 603 597 8.6 (8.64 0.34175) 90 5 038 38 (56) (336756) 2010 NV 1 322.7 286 9.41587 635.9 562 10.6 34 1 147 147 (1815) 474640 Alicanto 328.8 327.3 47.3324 610.3 607.3 6.4 314 2 028 28 (3611) (418993) 2009 MS 9 349.55 352.5 11.00317 688.1 694 10.0 (9.9) 42 1 134 134 (1995) 2010 GB 174 367 351.1 48.5600 686 653.7 6.5 223 3 018 18 (965) 2007 DA 61 475 500 2.6550 950 900 15.1 (14.913 0.470) 4.5 4 078 78 (29) 2010 BK 118 490 385 6.1050 980 770 10.2 38 1 292 292 (1319) 90377 Sedna 524.2 505.88 76.094 972.4 935.6 1.5 1000 2 090 90 (8819) 523622 2007 TG 422 530 501.8 35.5830 1030 968 6.2 343 2 034 34 (1956) (87269) 2000 OO 67 570 555 20.7900 1100 1110 9.2 60 2 034 34 (2187) 2002 RN 109 720 850 2.7040 1440 1201 15.3 4 3 038 38 (80) (308933) 2006 SQ 372 765 792 24.172 1500 1585 8.1 110 2 065 65 (1830) 2013 AZ 60 880 593 7.908 1700 1176 10.2 62.3 1 189 189 (8067) 709487 2013 BL 76 1251 940 8.37358 2494 1825 10.8 35 1 068 68 (687) 668643 2012 DR 30 (2009 FW 54) 1300 1036 14.546 2600 2030 7.1 171 0 206 206 (5375) 2005 VX 3 1300 1200 4.133 2700 2038 14.1 6 4 050 50 (81) 2014 FE 72 2000 1500 36.3 4000 3000 6.0789 0.1699 226 5 012 12 (623) Notes lower-alpha References last observation: 2014-08-25; arc: 1.88 years JPL Small-Body Database Browser: (2013 BL76) Jet Propulsion Laboratory http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2013BL76 https://archive.today/20140104104013/http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2013BL76 4 January 2014 dead 25 March 2016 2013 BL76 Seicchi Yoshida's Home Page http://www.aerith.net/comet/catalog/2013BL76/2013BL76.html 2013-07-12 15 January 2020 https://web.archive.org/web/20200115164331/http://aerith.net/comet/catalog/2013BL76/2013BL76.html dead 2013 BL76 IAU minor planet center http://www.minorplanetcenter.net/db_search/show_object?object_id=2013+BL76 https://archive.today/20130712183735/http://www.minorplanetcenter.net/db_search/show_object?object_id=2013+BL76 2013-07-12 live 2013-07-12 MPEC 2013-C12 : 2013 BL76 IAU Minor Planet Center 2013-02-03 http://www.minorplanetcenter.net/mpec/K13/K13C12.html 2013-10-14 (K13B76L) JPL Small-Body Database Search Engine: Asteroids and a > 100 (AU) JPL Solar System Dynamics http://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=all;obj_kind=ast;obj_numbered=all;OBJ_field=0;ORB_field=0;c1_group=ORB;c1_item=Bh;c1_op=%3E;c1_value=100;table_format=HTML;max_rows=100;format_option=comp;c_fields=AcBhBgBjBiBnBsCjCpAiCkBe;.cgifields=format_option;.cgifields=ast_orbit_class;.cgifields=table_format;.cgifields=obj_kind;.cgifields=obj_group;.cgifields=obj_numbered;.cgifields=com_orbit_class&query=1&c_sort=BhD https://web.archive.org/web/20140306160219/http://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=all;obj_kind=ast;obj_numbered=all;OBJ_field=0;ORB_field=0;c1_group=ORB;c1_item=Bh;c1_op=%3E;c1_value=100;table_format=HTML;max_rows=100;format_option=comp;c_fields=AcBhBgBjBiBnBsCjCpAiCkBe;.cgifields=format_option;.cgifields=ast_orbit_class;.cgifields=table_format;.cgifields=obj_kind;.cgifields=obj_group;.cgifields=obj_numbered;.cgifields=com_orbit_class&query=1&c_sort=BhD dead 2014-03-06 2013-10-13 (Epoch defined at will change every 6 months or so) AstDyS 2013BL76 Ephemerides Department of Mathematics, University of Pisa, Italy https://newton.spacedys.com/astdys/index.php?pc=1.1.3.0&n=2013BL76 2016-02-04 AstDys 2013BL76 Ephemerides for 1927 (when 100AU from Sun) Department of Mathematics, University of Pisa, Italy https://newton.spacedys.com/astdys/index.php?pc=1.1.3.1&n=2013BL76&oc=500&y0=1927&m0=6&d0=25&h0=0&mi0=0&y1=1927&m1=7&d1=1&h1=0&mi1=0&ti=1.0&tiu=days 2013-10-14 AstDys (90377) Sedna Ephemerides for 1975 (when 100AU from Sun) Department of Mathematics, University of Pisa, Italy https://newton.spacedys.com/astdys/index.php?pc=1.1.3.1&n=90377&oc=500&y0=1975&m0=6&d0=10&h0=0&mi0=0&y1=1975&m1=6&d1=15&h1=0&mi1=0&ti=1.0&tiu=days 2013-10-14 Absolute Magnitude (H) NASA/JPL http://neo.jpl.nasa.gov/glossary/h.html https://web.archive.org/web/20010302182040/http://neo.jpl.nasa.gov/glossary/h.html dead 2001-03-02 2013-10-13 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 2006 SQ372: A Likely Long-Period Comet from the Inner Oort Cloud The Astrophysical Journal 695 1 268–275 2009 10.1088/0004-637X/695/1/268 0901.1690 2009ApJ...695..268K 16987581 Horizons output https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2013BL76 Barycentric Osculating Orbital Elements for 2013 BL76 2014-03-06 (Solution using the Solar System Barycenter and barycentric coordinates. Select Ephemeris Type:Elements and Center:@0) Marc W. Buie Marc W. Buie Orbit Fit and Astrometric record for 13BL76 SwRI (Space Science Department) http://www.boulder.swri.edu/~buie/kbo/astrom/13BL76.html https://web.archive.org/web/20160206115404/http://www.boulder.swri.edu/~buie/kbo/astrom/13BL76.html 2016-02-06 2016-02-03 dead External links Webcite archive of Epoch 2015-06-27 with aphelion (Q) of 2467 AU 2013BL76 3625753 709487 (709487) 2013 BL 76 Category:Centaurs (small Solar System bodies) Category:Damocloids Category:Scattered disc and detached objects Category:Inner Oort cloud 20130110 Category:Minor planets with a retrograde orbit