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Asteroid Near-Earth Potentially hazardous

417217

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417217 (2005 YS)

Where is it now

Distance from Sun
0.884 AU
True anomaly
142.97°
Distance from Earth
0.431 AU
As of
15 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 — 0.997 AU from the Sun Earth 417217 — 0.884 AU from the Sun 417217
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 417217 is 0.431 AU from Earth today (3.6 light-minutes).

In the sky

Right ascension
11h 25m 24s
Declination
+48° 27′ 01″
Constellation
Ursa Major
Distance from Earth
0.43 AU
Elongation from the Sun
63.28° — well clear of the Sun

Favours the northern hemisphere; low or below the horizon from far south.

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
0.711 AU
Eccentricity
0.5503
Inclination
19.6°
Orbital period
219 days
Perihelion
0.32 AU
Aphelion
1.102 AU
Longitude of ascending node
288.58°
Argument of periapsis
327.93°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 11.7 LD
0.0301 AU
Tisserand (Jupiter)
7.899

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
357
Data arc
18.06 years
First observed
21 December 2005
Last observed
14 January 2024
Residual RMS
0.43 ″
Solution · Otto Matic
30 January 2024

Visual & observation

Absolute magnitude (H)
19.52

Discovery & classification

Discovered by
LINEAR
Discovery date
21 December 2005
Discovery site
Socorro

Also known as 2005 YS

Aten Near-Earth Object Potentially Hazardous Asteroid

Close approaches 154 on record

Flyby geometry
Ecliptic flyby of 417217 at 2026-12-20 14:04 UTC Top-down view of the ecliptic, Earth at the centre, for the 2026-12-20 14:04 UTC close approach of 417217. Catalogue miss distance 79.7 LD · 3.06 × 10⁷ km. The curve is the geocentric path from 2026-12-17 to 2026-12-23, 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 79.7 LD · 3.06 × 10⁷ km 2026-12-20 14:04 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2026-12-20 14:04 UTC close approach of 417217. Catalogue miss distance 79.7 LD · 3.06 × 10⁷ km. The curve is the geocentric path from 2026-12-17 to 2026-12-23, 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
2026-12-20 14:04:00 Earth 0.2049 AU 79.7 LD 13.4 km/s
2029-12-21 13:22:00 Earth 0.1992 AU 77.5 LD 13.4 km/s
2032-12-22 06:46:00 Earth 0.1944 AU 75.7 LD 13.4 km/s
2033-02-14 19:59:00 Venus 0.1202 AU 46.8 LD 22.7 km/s
2035-12-23 18:58:00 Earth 0.1903 AU 74.0 LD 13.5 km/s
2038-12-24 03:35:00 Earth 0.1869 AU 72.7 LD 13.5 km/s
2041-12-24 07:18:00 Earth 0.1846 AU 71.8 LD 13.5 km/s
2044-12-24 11:47:00 Earth 0.182 AU 70.8 LD 13.5 km/s
2047-12-25 17:11:00 Earth 0.1792 AU 69.8 LD 13.5 km/s
2050-12-25 22:51:00 Earth 0.1762 AU 68.6 LD 13.5 km/s

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

Sources