(357439) 2004 BL86
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Discovery[1] | |
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Discovered by | LINEAR (704) |
Discovery date | 30 January 2004 |
Designations | |
MPC designation | (357439) 2004 BL86 |
Apollo NEO, PHA[2] |
|
Orbital characteristics[2] | |
Epoch 13 January 2016 (JD 2457400.5) | |
Uncertainty parameter 0[2] | |
Observation arc | 4084 days (11.18 yr) |
Aphelion | 2.1069 AU (315.19 Gm) |
Perihelion | 0.89754 AU (134.270 Gm) |
1.50223 AU (224.730 Gm) | |
Eccentricity | 0.40252 |
1.84 yr (672.52 d) | |
208.11194° | |
Inclination | 23.77604° |
126.70921° | |
311.44162° | |
Known satellites | 1[3] |
Earth MOID | 0.00810452 AU (1,212,419 km) |
Jupiter MOID | 3.24294 AU (485.137 Gm) |
Physical characteristics | |
Dimensions | 325 m (1,066 ft)[3] |
2.6205 h (0.10919 d) | |
V-type asteroid[4] | |
19.3[2] | |
(357439) 2004 BL86,[5] provisionally known as 2004 BL86, is a near-Earth asteroid estimated to be about 325 meters (1,066 feet) in diameter.[3] It was discovered on 30 January 2004 by LINEAR.[1] It passed 1,199,600 km (745,400 mi), or 3.1 lunar distances, from Earth on 26 January 2015 at 16:20 UTC.[5][6] During the 2015 approach it was determined to have a satellite.
2015 Earth approach
On 26–27 January 2015, the asteroid briefly peaked around apparent magnitude 9 and was near the celestial equator.[7] The asteroid was visible in telescopes with objectives of 100 mm (4 in) or larger; high-end binoculars under a dark sky may also have worked.[8] Near closest approach the asteroid was moving about 2.5 degrees per hour (2.5 arcseconds per second).[7][9] The asteroid came to opposition (furthest elongation in the sky from the Sun) on 27 January 2015 at 04:37 UTC.[7] Around 5:00 UTC, the asteroid was near M44 (the Beehive Cluster).[9]
26 January 2015 approach of 3.1 lunar distances was the closest approach of 2004 BL86 for at least the next 200 years.[5][6][10] For comparison, 2015 TB145 about twice the size of 2004 BL86, passed 486,800 km (302,500 mi), or 1.3 lunar distances, from Earth on 31 October 2015.[11]
Satellite
A satellite was first detected by ground-based telescopes by Joe Pollock and Petr Pravec.[12] Observations by the Goldstone Deep Space Communications Complex and Green Bank Telescope confirmed that it is a binary asteroid with a secondary roughly 70 meters (230 feet) across.[3] The secondary is estimated to orbit at least 500 metres (1,600 ft) from the primary.[13] About 16% of asteroids over 200 metres (660 ft) in diameter are thought to be binaries.[3]
Gallery
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Asteroid2004BL86-20150119.png
Asteroid 2004 BL86 safely passes Earth on 26 January 2015
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Asteroid-2004BL86-EarthCloseApproach-20150126.png
Trajectory of 2004 BL86 during Earth close approach
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2004BL86XiPup2.jpg
2004 BL86 (star trail on left) near Xi Puppis
References
- ↑ 1.0 1.1 Lua error in package.lua at line 80: module 'strict' not found. (K04B86L)
- ↑ 2.0 2.1 2.2 2.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 3.3 3.4 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 5.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 6.0 6.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 7.0 7.1 7.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 9.0 9.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
External links
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Wikimedia Commons has media related to (357439) 2004 BL86. |
- Orbital simulation from JPL (Java) / Ephemeris
- Sky & Telescope B/W finder chart
- (357439) 2004 BL86 at the JPL Small-Body Database
- Pages with broken file links
- Use dmy dates from March 2015
- Commons category link is defined as the pagename
- Astronomical objects discovered in 2004
- Apollo asteroids
- Binary asteroids
- Discoveries by LINEAR
- Near-Earth objects in 2015
- Numbered minor planets
- Potentially hazardous asteroids
- Radar-imaged asteroids
- V-type asteroids