2017 OO1
{{Short description|Small asteroid}}
{{DISPLAYTITLE:{{mp|2017 OO|1}}}}
{{Infobox planet
| minorplanet = yes
| name = {{mp|2017 OO|1}}
| background = #FFC2E0
| image = 2017 OO1 orbit-Aug2017.png
| image_scale =
| caption = The orbit of {{mp|2017 OO|1}} and positions on 8/1/2017
| discoverer = ATLAS-MLO
| discovery_site = Mauna Loa Obs.
| discovered = 23 July 2017
{{small|(first observed only)}}
| mpc_name = {{mp|2017 OO|1}}
| alt_names =
| pronounced =
| named_after =
| epoch = 23 March 2018 (JD 2458200.5)
| uncertainty = 4
| observation_arc = 9 days
| aphelion = 1.0173 AU
| perihelion = 0.7714 AU
| semimajor = 0.8943 AU
| eccentricity = 0.1375
| period = 309 days
| mean_anomaly = 97.402°
| mean_motion = {{Deg2DMS|1.1653|sup=ms}} / day
| inclination = 20.026°
| asc_node = 298.31°
| arg_peri = 186.14°
| moid = {{convert|0.0001982|AU|LD|abbr=on}}
| mean_diameter = {{val|35|ul=m}} {{small|(est. at 0.24)}}
{{val|35|-|77|u=m}} {{small|(estimate)}}
{{val|76|u=m}} {{small|(est. at 0.05)}}
| rotation =
| albedo =
| spectral_type =
}}
{{mp|2017 OO|1}} is a small asteroid, classified as near-Earth object of the Aten group, approximately {{convert|35|-|76|m|ft|abbr=off|sp=us}} in diameter. It was first observed on 23 July 2017, by the robotic ATLAS survey at Mauna Loa Observatory, Hawaii, two days after the object had approached Earth at 0.33 lunar distances on 21 July 2017.
Orbit and classification
{{mp|2017 OO|1}} is a member of the Aten asteroid, a subgroup of near-Earth objects that are located in the zone of influence of Venus. Atens are a much smaller group than the Apollo and Amor asteroids.
The object has an exceptionally low minimum orbital intersection distance with Earth of 29,650 kilometers or 0.077 lunar distances (LD). It orbits the Sun at a distance of 0.77–1.02 AU once every 10 months (309 days; semi-major axis of 0.89 AU). Its orbit has an eccentricity of 0.14 and an inclination of 20° with respect to the ecliptic. The body's observation arc begins with an observation made by the space-based Wide-field Infrared Survey Explorer on 22 July 2017, one day after its close flyby and a day before its official first observation.
Close approaches
On 21 July 2017, at 03:32 UT, it flew past Earth at a nominal distance of 127,500 kilometers (0.33 LD) with a relative velocity of 10.36 km/s. All future encounters with Earth will occur at a significantly larger distance.
{{multiple image
|direction = horizontal
|align= left
|width1= 200
|width2= 250
|image1=2017 OO1 flyby.png
|image2=2017 OO1 skyview.png
|footer=The objects trajectory inside the orbit of the Moon (left), and its path in the sky during flyby, seen from the center of the Earth
}}
{{clear|left}}
Physical characteristics
Based on a generic magnitude-to-diameter conversion, {{mp|2017 OO|1}} measures between {{convert|35|-|76|m|ft|abbr=off|sp=us}} in diameter, for an absolute magnitude of 24.5, and an assumed albedo between 0.05 and 0.24, which represent typical values for carbonaceous and stony asteroids, respectively. As of 2018, no rotational lightcurve 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 by the Minor Planet Center.
References
{{reflist|30em|refs=
|type = 2017-07-31 last obs.
|title = JPL Small-Body Database Browser: (2017 OO1)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3778084
|publisher = Jet Propulsion Laboratory
|accessdate = 21 March 2018}}
|title = 2017 OO1
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=2017+OO1
|accessdate = 21 March 2018}}
|title = Asteroid Size Estimator
|publisher = CNEOS NASA/JPL
|url = https://cneos.jpl.nasa.gov/tools/ast_size_est.html
|accessdate = 21 March 2018}}
|title = Asteroid 2017 OO1 flew past Earth at a very close distance of 0.33 LD
|date = 25 July 2017
|website = The Watchers
|url = https://watchers.news/2017/07/25/asteroid-2017-oo1
|accessdate = 21 March 2018}}
}}
External links
- [https://minorplanetcenter.net//mpec/K17/K17O52.html MPEC 2017-O52 : 2017 OO1], Minor Planet Electronic Circular
- [https://www.minorplanetcenter.net/iau/lists/t_atens.html List Of Aten Minor Planets (by designation)], Minor Planet Center
- [https://earthsky.org/space/asteroid-2017-oo1-close-pass-undetected Close shave from an undetected asteroid], EarthSky, 25 July 2017
- [https://web.archive.org/web/20180321193039/http://iawn.net/2017/07/25/asteroid-2017-oo1-close-approach/ Asteroid 2017 OO1 close approach], International Asteroid Warning Network (IAWN)
- [http://minorplanetcenter.net/neo/view?date=2457955.65&label=2017%20OO1&packed_desig=K17O01O Trajectory Diagram], Minor Planet Center
- {{NeoDys|2017OO1}}
- {{JPL small body|id=3778084}}
{{use dmy dates|date=March 2018}}
{{2017 in space}}
{{Small Solar System bodies}}
{{DEFAULTSORT:2017 OO1}}