2018 BD
{{Use dmy dates|date=February 2018}}
{{Infobox planet
| minorplanet = yes
| name = 2018 BD
| background = #FFC2E0
| image = 2018 BD-orbit.png
| image_scale =
| caption = Orbit before and after 1/18/2018 flyby
| discoverer = CSS
| discovery_site = Mount Lemmon Obs.
| discovered = 18 January 2018
{{small|(first observed only)}}
| mpc_name = 2018 BD
| alt_names =
| pronounced =
| named_after =
| mp_category = NEO{{·}}Apollo
| epoch = 23 March 2018 (JD 2458200.5)
| uncertainty = 7
| observation_arc = 1 day
| aphelion = 1.3555 AU
| perihelion = 0.7508 AU
| semimajor = 1.0531 AU
| eccentricity = 0.2871
| period = 1.08 yr (395 days)
| mean_anomaly = 357.05°
| mean_motion = {{Deg2DMS|0.9120|sup=ms}} / day
| inclination = 2.4082°
| asc_node = 298.10°
| arg_peri = 273.70°
| moid = {{val|6.019|e=-6}} AU
(0.00234 LD)
| mean_diameter = {{val|2|ul=m}} {{small|(est. at 0.35)}}
{{val|6|u=m}} {{small|(est. at 0.05)}}
| rotation =
| albedo =
| spectral_type =
}}
{{mp|2018 BD}} is a small asteroid and near-Earth object of the Apollo group, approximately {{convert|2|-|6|m|ft|sigfig=1|sp=us}} in diameter. It was first observed on 18 January 2018, by astronomers of the Catalina Sky Survey at Mount Lemmon Observatory, Arizona, United States, just hours before passing about 0.10 lunar distances from the Earth.
Orbit and classification
2018 BD is an Apollo asteroid. It orbits the Sun at a distance of 0.75–1.36 AU once every 13 months (395 days; semi-major axis of 1.05 AU). Its orbit has an eccentricity of 0.29 and an inclination of 2° with respect to the ecliptic.
The object has an exceptionally low minimum orbital intersection distance with Earth of {{convert |0.000006019 |AU |km mi|abbr=on |lk=off |sigfig=3 |order=flip}}, or 0.002 lunar distances.
= 2018 approach =
{{multiple image
|direction = horizontal
|align= left
|width1= 245
|width2= 290
|image1=2018 BD flyby.png
|image2=2018 BD-skyview.png
|caption1=2018 BD passing near geosynchronous orbit
|caption2=The object's motion across the sky in 15 minutes intervals west to east
}}
{{clear|left}}
Physical characteristics
Based on a generic magnitude-to-diameter conversion, {{mp|2018 BD}} measures between 2 and 6 meters in diameter, for an absolute magnitude of 30.154, and an assumed albedo between 0.05 and 0.20, which represent typical values for carbonaceous and a bright E-type asteroids, respectively. As of 2018, no rotational light curve of this object has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.
Numbering and naming
This minor planet has neither been numbered nor named.
See also
References
{{reflist|30em|refs=
|type = 2018-01-18 last obs.
|title = JPL Small-Body Database Browser: (2018 BD)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3797701;cad=1#cad
|publisher = Jet Propulsion Laboratory
|accessdate = 22 February 2018}}
|title = 2018 BD
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=2018+BD
|accessdate = 22 February 2018}}
|title = Asteroid Size Estimator
|publisher = CNEOS NASA/JPL
|url = https://cneos.jpl.nasa.gov/tools/ast_size_est.html
|accessdate = 22 February 2018}}
}}
External links
- [https://minorplanetcenter.net/neo/view?date=2458137.155&label=2018%20BD&packed_desig=K18B00D Flyby diagram of 2018 BD], Minor Planet Center
- [https://watchers.news/2018/01/18/asteroid-2018-bd-missed-earth-by-just-0-10-ld-on-january-18/ Asteroid 2018 BD missed Earth by just 0.10 LD on January 18], The Watchers, 18 January 2018
- [http://bgr.com/2018/01/19/asteroid-2018-bd-discovered-hours-before-earth-flyby/ A new asteroid was discovered just seven hours before cruising past Earth], BGR.com, 19 January 2018
- {{NeoDys|2018BD}}
- {{JPL small body|id=3797701}}
{{2018 in space}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:2018 BD}}
Category:Minor planet object articles (unnumbered)
Category:Discoveries by the Catalina Sky Survey