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Asteroid Near-Earth Potentially hazardous

477465

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477465 (2009 XZ1)

Where is it now

Distance from Sun
0.495 AU
True anomaly
296.17°
Distance from Earth
1.426 AU
As of
19 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 477465 — 0.495 AU from the Sun 477465
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 477465 is 1.426 AU from Earth today (11.9 light-minutes).

In the sky

Right ascension
13h 04m 22s
Declination
-03° 50′ 24″
Constellation
Virgo
Distance from Earth
1.42 AU
Elongation from the Sun
11.15° — too close to the Sun to observe

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
0.856 AU
Eccentricity
0.5338
Inclination
8.16°
Orbital period
289.2 days
Perihelion
0.399 AU
Aphelion
1.313 AU
Longitude of ascending node
81.97°
Argument of periapsis
153.01°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 16.4 LD
0.0422 AU
Tisserand (Jupiter)
6.759

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
191
Data arc
23.02 years
First observed
10 December 2001
Last observed
18 December 2024
Residual RMS
0.38 ″
Solution · Otto Matic
25 December 2024

Visual & observation

Absolute magnitude (H)
21.7

Discovery & classification

Discovered by
CSS
Discovery date
11 December 2009
Discovery site
Catalina

Also known as 2009 XZ1

Aten Near-Earth Object Potentially Hazardous Asteroid

Close approaches 236 on record

Flyby geometry
Ecliptic flyby of 477465 at 2031-10-06 05:42 UTC Top-down view of the ecliptic, Earth at the centre, for the 2031-10-06 05:42 UTC close approach of 477465. Catalogue miss distance 53.0 LD · 2.04 × 10⁷ km. The curve is the geocentric path from 2031-10-03 to 2031-10-09, 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 south of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 4 Oct 8 Oct 53.0 LD · 2.04 × 10⁷ km 2031-10-06 05:42 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2031-10-06 05:42 UTC close approach of 477465. Catalogue miss distance 53.0 LD · 2.04 × 10⁷ km. The curve is the geocentric path from 2031-10-03 to 2031-10-09, 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 south 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
2028-06-15 13:40:00 Mercury 0.0329 AU 12.8 LD 25.9 km/s
2028-06-15 13:40:00 Merc 0.0329 AU 12.8 LD 25.9 km/s
2030-10-11 19:32:00 Mercury 0.0361 AU 14.0 LD 25.1 km/s
2030-10-11 19:32:00 Merc 0.0361 AU 14.0 LD 25.1 km/s
2031-10-06 05:42:00 Earth 0.1363 AU 53.0 LD 16.6 km/s
2032-12-30 17:27:00 Earth 0.0492 AU 19.2 LD 15.4 km/s
2033-12-31 07:21:00 Merc 0.0585 AU 22.8 LD 29 km/s
2036-04-28 14:16:00 Mercury 0.0327 AU 12.7 LD 21.3 km/s
2036-04-28 14:16:00 Merc 0.0327 AU 12.7 LD 21.3 km/s
2039-07-18 04:31:00 Mercury 0.0958 AU 37.3 LD 33.1 km/s

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

Sources