2018 BD

Orbit before and after 1/18/2018 flyby

Discovery[1]
Discovered by| CSS
Discovery site| Mount Lemmon Obs.
Discovery date| 18 January 2018
(first observed only)
Designations

MPC designation

| 2018 BD
Minor planet category| NEO * Apollo[1][2]
Orbital characteristics[2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 7
Observation arc| 1 day
|{{{apsis}}}|helion}}| 1.3555 AU
|{{{apsis}}}|helion}}| 0.7508 AU

Semi-major axis

| 1.0531 AU
Eccentricity| 0.2871
Orbital period| 1.08 yr (395 days)
Mean anomaly| 357.05°
Mean motion| 0° 54m 43.2s / day
Inclination| 2.4082°
Longitude of ascending node| 298.10°

|{{{apsis}}}|helion}}

| 273.70°
Earth MOID| 6.019×10−6 AU
(0.00234 LD)
Physical characteristics
Mean diameter| 2 m (est. at 0.35)[3]
6 m (est. at 0.05)[3]
Absolute magnitude (H)| 30.154[2]

2018 BD is a small asteroid and near-Earth object of the Apollo group, approximately 2–6 meters (7–20 ft) in diameter. It was first observed on 18 January 2018, by astronomers of the Catalina Sky Survey at Mount Lemmon Observatory, Arizona, United States,[1] just hours before passing about 0.10 lunar distances of the Earth.[2]

## Contents

* 1 Orbit and classification
* 1.1 2018 approach
* 2 Physical characteristics
* 3 Numbering and naming
* 4 References
* 5 See also
* 6 External links

## 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.[2]

The object has an exceptionally low minimum orbital intersection distance with Earth of 900 km; 560 mi (0.000006019 AU), or 0.002 lunar distances.[2]

### 2018 approach

2018 BD passing near geosynchronous orbit

The object's motion across the sky in 15 minutes intervals west to east

## Physical characteristics

Based on a generic magnitude-to-diameter conversion, 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.[3] As of 2018, no rotational lightcurve of this object has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.[2]

## Numbering and naming

This minor planet has neither been numbered nor named.[1]

## References

1. ↑ 1.0 1.1 1.2 1.3 "2018 BD". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=2018+BD. Retrieved 22 February 2018.
2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 "JPL Small-Body Database Browser: (2018 BD)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3797701;cad=1#cad. Retrieved 22 February 2018.
3. ↑ 3.0 3.1 3.2 "Asteroid Size Estimator". CNEOS NASA/JPL. https://cneos.jpl.nasa.gov/tools/ast_size_est.html. Retrieved 22 February 2018.

## See also

* List of asteroid close approaches to Earth in 2018

## External links

* Flyby diagram of 2018 BD, Minor Planet Center
* Asteroid 2018 BD missed Earth by just 0.10 LD on January 18, The Watchers, 18 January 2018
* A new asteroid was discovered just seven hours before cruising past Earth, BGR.com, 19 January 2018
* 2018 BD at NeoDyS-2, Near Earth Objects—Dynamic Site
* Ephemeris * Obs prediction * Orbital info * MOID * Proper elements * Obs info * Close * Physical info * NEOCC
* 2018 BD at the JPL Small-Body Database
* Close approach * Discovery * Ephemeris * Orbit diagram * Orbital elements * Physical parameters

* v
* t
* e

2018 in space

* « 2017

2019 »

Space probe launches |

* TESS (lunar flyby; Apr 2018)
* InSight / Mars Cube One (mission to Mars; May 2018)
* Parker Solar Probe (solar space mission; Aug 2018)
* BepiColombo (mission to Mercury; Oct 2018)
* Chang'e 4 / Yutu-2 (mission to the Moon; Dec 2018)

Impact events|

* 2018 LA
* Kamchatka meteor

Selected NEOs|

* Asteroid close approaches
* 2010 WC9
* 2017 VR12
* 2017 YE5
* 2017 YZ1
* 2018 AH
* 2018 BD
* 2018 BF3
* 2018 CB
* 2018 CC
* 2018 CF2
* 2018 CL
* 2018 CN2
* 2018 CY2
* 2018 DV1
* 2018 GE3
* 2018 PD20
* 2018 LF16
* 2018 WV1
* (276033) 2002 AJ129
* (163899) 2003 SD220
* (505657) 2014 SR339

Exoplanets |

* Gliese 1132 c
* K2-141b
* K2-146b
* K2-148b
* K2-155d
* K2-229b
* K2-239b
* K2-239c
* K2-239d
* K2-288Bb
* Barnard's Star b
* EPIC 211945201 b
* HD 89345 b
* KELT-21b
* NGTS-3Ab

Discoveries|

* AT2018cow
* Novae (List)
* Carina
* Musca
* Perseus
* MACS J1149 Lensed Star 1
* Hyperion proto-supercluster
* 2015 TH367 (orbit announced)
* 2015 TG387 (orbit announced)
* 2017 OF69 (announced)
* 2018 VG18

Comets |

* C/2018 V1
* 46P/Wirtanen
* Hyperbolic comets
* C/2017 U7 (announced in 2018)
* C/2018 C2 (Lemmon)
* C/2018 F4 (PANSTARRS)

Space exploration|

* Hayabusa2 (asteroid Ryugu arrival; June 2018)
* OSIRIS-REx (asteroid Bennu arrival; Dec 2018)
* New Horizons (encounter with 486958 Arrokoth; Dec 2018 / Jan 2019)
* Dawn retirement
* Kepler retirement

* Category:2017 in space — Category:2018 in space — Category:2019 in space

* v
* t
* e

Small Solar System bodies

Minor planets|

* Designation
* Groups
* List
* Moon
* Meanings of names

Asteroid|

* Aten asteroid
* Asteroid belt
* Family
* Jupiter trojan
* Near-Earth
* Spectral types

Distant minor planet|

* Centaur
* Damocloid
* Neptune trojan
* Trans-Neptunian object
* Detached
* Kuiper belt
* Oort cloud
* Scattered disc

Comets|

* Extinct
* Great
* Halley-type
* Hyperbolic
* Long-period
* Lost
* Main-belt
* Near-parabolic
* Periodic
* Sungrazing

Other|

* Meteoroids

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