Skip to content
Public Universe
Asteroid Near-Earth Potentially hazardous

216523

Add to an observing list or journal →

216523 (2001 HY7)

Where is it now

Distance from Sun
1.281 AU
True anomaly
188.42°
Distance from Earth
2.163 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 216523 — 1.281 AU from the Sun 216523
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 216523 is 2.163 AU from Earth today (18.0 light-minutes).

In the sky

Right ascension
15h 08m 56s
Declination
-15° 36′ 06″
Constellation
Libra
Distance from Earth
2.16 AU
Elongation from the Sun
20.5° — near the Sun — look low at dusk or dawn

Favours the southern hemisphere; low or below the horizon from far north.

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
0.914 AU
Eccentricity
0.4121
Inclination
5.21°
Orbital period
319 days
Perihelion
0.537 AU
Aphelion
1.29 AU
Longitude of ascending node
205.04°
Argument of periapsis
211.34°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 13.7 LD
0.0352 AU
Tisserand (Jupiter)
6.455

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
353
Data arc
22.21 years
First observed
15 April 2001
Last observed
30 June 2023
Residual RMS
0.5 ″
Solution · Otto Matic
13 February 2025

Physical properties

Rotation period
0.04 hours

Visual & observation

Absolute magnitude (H)
20.7

Discovery & classification

Discovered by
LINEAR
Discovery date
18 April 2001
Discovery site
Socorro

Also known as 2001 HY7

Aten Near-Earth Object Potentially Hazardous Asteroid

Close approaches 90 on record

Flyby geometry
Ecliptic flyby of 216523 at 2035-03-28 04:43 UTC Top-down view of the ecliptic, Earth at the centre, for the 2035-03-28 04:43 UTC close approach of 216523. Catalogue miss distance 65.2 LD · 2.51 × 10⁷ km. The curve is the geocentric path from 2035-03-25 to 2035-03-31, 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 65.2 LD · 2.51 × 10⁷ km 2035-03-28 04:43 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2035-03-28 04:43 UTC close approach of 216523. Catalogue miss distance 65.2 LD · 2.51 × 10⁷ km. The curve is the geocentric path from 2035-03-25 to 2035-03-31, 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
2032-07-11 14:43:00 Venus 0.0986 AU 38.4 LD 13.2 km/s
2034-02-02 10:06:00 Venus 0.11 AU 42.8 LD 16.8 km/s
2035-03-28 04:43:00 Earth 0.1677 AU 65.2 LD 16.8 km/s
2042-03-25 12:47:00 Earth 0.0942 AU 36.7 LD 14.5 km/s
2044-08-07 12:43:00 Venus 0.1335 AU 52.0 LD 11.3 km/s
2049-02-07 01:47:00 Venus 0.1364 AU 53.1 LD 10.5 km/s
2049-03-24 00:08:00 Earth 0.0475 AU 18.5 LD 12.8 km/s
2056-03-23 08:46:00 Earth 0.0348 AU 13.5 LD 11.8 km/s
2061-03-19 12:30:00 Venus 0.1355 AU 52.7 LD 11.4 km/s
2063-03-24 01:22:00 Earth 0.0409 AU 15.9 LD 11.2 km/s

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

Sources