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Asteroid Near-Earth

2005 YO128

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(2005 YO128)

Where is it now

Distance from Sun
1.042 AU
True anomaly
198.42°
Distance from Earth
1.091 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 2005 YO128 — 1.042 AU from the Sun 2005 YO128
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2005 YO128 is 1.091 AU from Earth today (9.1 light-minutes).

In the sky

Right ascension
09h 56m 04s
Declination
+15° 56′ 58″
Constellation
Leo
Distance from Earth
1.09 AU
Elongation from the Sun
59.73° — near the Sun — look low at dusk or dawn

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
0.821 AU
Eccentricity
0.2966
Inclination
15.59°
Orbital period
271.7 days
Perihelion
0.578 AU
Aphelion
1.065 AU
Longitude of ascending node
281.7°
Argument of periapsis
328.43°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 5.6 LD
0.0144 AU
Tisserand (Jupiter)
7.068

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
36
Data arc
5 days
First observed
30 December 2005
Last observed
4 January 2006
Residual RMS
0.62 ″
Solution · Otto Matic
14 April 2021

Visual & observation

Absolute magnitude (H)
24.6

Discovery & classification

Aten Near-Earth Object

Close approaches 121 on record

Flyby geometry
Ecliptic flyby of 2005 YO128 at 2028-11-15 15:08 UTC Top-down view of the ecliptic, Earth at the centre, for the 2028-11-15 15:08 UTC close approach of 2005 YO128. Catalogue miss distance 96.5 LD · 3.71 × 10⁷ km. The curve is the geocentric path from 2028-11-12 to 2028-11-18, 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 96.5 LD · 3.71 × 10⁷ km 2028-11-15 15:08 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2028-11-15 15:08 UTC close approach of 2005 YO128. Catalogue miss distance 96.5 LD · 3.71 × 10⁷ km. The curve is the geocentric path from 2028-11-12 to 2028-11-18, 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
2028-11-15 15:08:00 Earth 0.2479 AU 96.5 LD 10.2 km/s
2029-03-31 22:18:00 Earth 0.4154 AU 161.7 LD 10 km/s
2031-12-10 07:27:00 Earth 0.1826 AU 71.0 LD 9.3 km/s
2034-12-28 10:20:00 Earth 0.0923 AU 35.9 LD 9.3 km/s
2037-08-10 04:50:00 Earth 0.3646 AU 141.9 LD 13 km/s
2038-01-05 03:02:00 Earth 0.0279 AU 10.9 LD 10.9 km/s
2040-07-21 22:24:00 Earth 0.3937 AU 153.2 LD 15.3 km/s
2041-01-04 15:02:00 Earth 0.174 AU 67.7 LD 14.7 km/s
2042-01-11 06:16:00 Venus 0.1296 AU 50.5 LD 15.8 km/s
2043-07-04 20:19:00 Earth 0.4182 AU 162.8 LD 16.8 km/s

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

Sources