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Asteroid Near-Earth

2011 HN5

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(2011 HN5)

Where is it now

Distance from Sun
0.697 AU
True anomaly
348.36°
Distance from Earth
0.466 AU
As of
21 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 — 0.995 AU from the Sun Earth 2011 HN5 — 0.697 AU from the Sun 2011 HN5
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2011 HN5 is 0.466 AU from Earth today (3.9 light-minutes).

In the sky

Right ascension
11h 20m 28s
Declination
+03° 02′ 37″
Constellation
Leo
Distance from Earth
0.47 AU
Elongation from the Sun
39.09° — near the Sun — look low at dusk or dawn

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
0.918 AU
Eccentricity
0.2442
Inclination
3.99°
Orbital period
321.4 days
Perihelion
0.694 AU
Aphelion
1.142 AU
Longitude of ascending node
223.12°
Argument of periapsis
201.67°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 15.0 LD
0.0385 AU
Tisserand (Jupiter)
6.48

Orbit quality

Orbit very well determined (uncertainty code 1).

Observations used
50
Data arc
15.15 years
First observed
27 April 2011
Last observed
22 June 2026
Residual RMS
0.78 ″
Solution · Otto Matic
1 July 2026

Visual & observation

Absolute magnitude (H)
25.1

Discovery & classification

Aten Near-Earth Object

Close approaches 74 on record

Flyby geometry
Ecliptic flyby of 2011 HN5 at 2033-04-23 13:34 UTC Top-down view of the ecliptic, Earth at the centre, for the 2033-04-23 13:34 UTC close approach of 2011 HN5. Catalogue miss distance 39.7 LD · 1.52 × 10⁷ km. The curve is the geocentric path from 2033-04-20 to 2033-04-26, 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. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 39.7 LD · 1.52 × 10⁷ km 2033-04-23 13:34 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2033-04-23 13:34 UTC close approach of 2011 HN5. Catalogue miss distance 39.7 LD · 1.52 × 10⁷ km. The curve is the geocentric path from 2033-04-20 to 2033-04-26, 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. 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
2033-04-23 13:34:00 Earth 0.1019 AU 39.7 LD 5.2 km/s
2040-03-31 04:52:00 Earth 0.1141 AU 44.4 LD 9.7 km/s
2041-07-17 11:54:00 Earth 0.1478 AU 57.5 LD 10.3 km/s
2048-07-01 07:00:00 Earth 0.1022 AU 39.8 LD 5 km/s
2051-05-24 13:46:00 Venus 0.1152 AU 44.9 LD 10.9 km/s
2055-05-06 03:54:00 Earth 0.1191 AU 46.3 LD 5.3 km/s
2057-07-20 18:29:00 Venus 0.0943 AU 36.7 LD 9.9 km/s
2062-03-31 11:40:00 Earth 0.0426 AU 16.6 LD 7 km/s
2063-09-15 13:01:00 Venus 0.09 AU 35.0 LD 9.7 km/s
2069-11-10 11:04:00 Venus 0.0833 AU 32.4 LD 9.3 km/s

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

Sources