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Asteroid Near-Earth Potentially hazardous

2009 UY17

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(2009 UY17)

Where is it now

Distance from Sun
0.973 AU
True anomaly
140.13°
Distance from Earth
0.192 AU
As of
17 October 2026

Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.

Sun Earth — 0.996 AU from the Sun Earth 2009 UY17 — 0.973 AU from the Sun 2009 UY17
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2009 UY17 is 0.192 AU from Earth today (1.6 light-minutes).

In the sky

Right ascension
18h 41m 25s
Declination
+07° 23′ 15″
Constellation
Ophiuchus
Distance from Earth
0.19 AU
Elongation from the Sun
78.54° — well clear of the Sun

Visible from both hemispheres.

From your location

See how high it is right now, whether it is up after civil twilight, and when it rises and sets where you are.

How do I find my coordinates?

Google Maps on a computer

  1. Right-click the spot where you'll be observing.
  2. The first line of the menu is the coordinates, e.g. 51.50722, -0.12758 — click it and they're copied.
  3. Paste them above.

Google Maps on a phone

  1. Press and hold the spot to drop a pin.
  2. The coordinates appear in the search bar (or on the pin's card) — tap to copy, then paste above.

A full Google Maps link works too, but the short maps.app.goo.gl share links don't carry coordinates — copy the numbers instead. We round to about a kilometre; that's all the sky calculation needs.

Know your what3words address? Paste it, e.g. ///filled.count.soap. This is optional — the three words are sent to what3words to convert them, and we don't store the address or the result.

Your location stays in your browser and is sent only for this calculation. Using a what3words address is optional; if you do, the three words go to what3words to be converted and we don't record them. Set a location first, then you can save an email alert for this object. See our privacy policy.

Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.

Orbital elements

Semi-major axis
0.819 AU
Eccentricity
0.3163
Inclination
42.06°
Orbital period
270.5 days
Perihelion
0.56 AU
Aphelion
1.077 AU
Longitude of ascending node
202.06°
Argument of periapsis
30.57°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 5.4 LD
0.0139 AU
Tisserand (Jupiter)
6.915

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
20
Data arc
25 days
First observed
15 October 2009
Last observed
9 November 2009
Residual RMS
0.22 ″
Solution · Otto Matic
13 August 2022

Visual & observation

Absolute magnitude (H)
20.92

Discovery & classification

Aten Near-Earth Object Potentially Hazardous Asteroid

Close approaches 44 on record

Flyby geometry
Ecliptic flyby of 2009 UY17 at 2026-10-19 00:44 UTC Top-down view of the ecliptic, Earth at the centre, for the 2026-10-19 00:44 UTC close approach of 2009 UY17. Catalogue miss distance 68.2 LD · 2.62 × 10⁷ km. The curve is the geocentric path from 2026-10-16 to 2026-10-22, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. At closest approach the object is north of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 68.2 LD · 2.62 × 10⁷ km 2026-10-19 00:44 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2026-10-19 00:44 UTC close approach of 2009 UY17. Catalogue miss distance 68.2 LD · 2.62 × 10⁷ km. The curve is the geocentric path from 2026-10-16 to 2026-10-22, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. At closest approach the object is north of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate.

JPL Horizons

When (UTC) Body Distance Lunar distances Relative speed
2026-10-19 00:44:00 Earth 0.1751 AU 68.2 LD 23.6 km/s
2029-10-14 20:32:00 Earth 0.0292 AU 11.4 LD 20.9 km/s
2035-10-15 00:30:00 Earth 0.4203 AU 163.6 LD 21.4 km/s
2043-10-23 11:32:00 Earth 0.3221 AU 125.4 LD 26.6 km/s
2046-10-17 15:59:00 Earth 0.1128 AU 43.9 LD 22.6 km/s
2049-10-14 03:12:00 Earth 0.0946 AU 36.8 LD 20.4 km/s
2052-10-13 08:18:00 Earth 0.2948 AU 114.7 LD 20.4 km/s
2055-05-28 00:48:00 Venus 0.1465 AU 57.0 LD 31.5 km/s
2055-10-16 00:17:00 Earth 0.4856 AU 189.0 LD 22.2 km/s
2060-10-27 03:04:00 Earth 0.4535 AU 176.5 LD 29.8 km/s

Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.

Sources