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Asteroid Near-Earth

2015 HA1

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(2015 HA1)

Where is it now

Distance from Sun
1.015 AU
True anomaly
243.55°
Distance from Earth
1.85 AU
As of
22 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 2015 HA1 — 1.015 AU from the Sun 2015 HA1
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2015 HA1 is 1.85 AU from Earth today (15.4 light-minutes).

In the sky

Right ascension
15h 19m 07s
Declination
-22° 01′ 18″
Constellation
Libra
Distance from Earth
1.85 AU
Elongation from the Sun
23.2° — 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
0.964 AU
Eccentricity
0.1883
Inclination
19.87°
Orbital period
345.8 days
Perihelion
0.783 AU
Aphelion
1.146 AU
Longitude of ascending node
57.3°
Argument of periapsis
315.23°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 21.5 LD
0.0554 AU
Tisserand (Jupiter)
6.192

Orbit quality

Orbit very well determined (uncertainty code 2).

Observations used
439
Data arc
372 days
First observed
16 April 2015
Last observed
22 April 2016
Residual RMS
0.31 ″
Solution · Otto Matic
1 March 2023

Physical properties

Rotation period
47.2 hours

Visual & observation

Absolute magnitude (H)
21.18

Discovery & classification

Aten Near-Earth Object

Close approaches 129 on record

Flyby geometry
Ecliptic flyby of 2015 HA1 at 2030-12-22 14:51 UTC Top-down view of the ecliptic, Earth at the centre, for the 2030-12-22 14:51 UTC close approach of 2015 HA1. Catalogue miss distance 94.0 LD · 3.61 × 10⁷ km. The curve is the geocentric path from 2030-12-19 to 2030-12-25, 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 94.0 LD · 3.61 × 10⁷ km 2030-12-22 14:51 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2030-12-22 14:51 UTC close approach of 2015 HA1. Catalogue miss distance 94.0 LD · 3.61 × 10⁷ km. The curve is the geocentric path from 2030-12-19 to 2030-12-25, 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
2028-01-26 23:01:00 Venus 0.0923 AU 35.9 LD 10.4 km/s
2030-12-22 14:51:00 Earth 0.2415 AU 94.0 LD 14.7 km/s
2031-11-16 14:58:00 Earth 0.1835 AU 71.4 LD 12.4 km/s
2032-05-03 03:21:00 Earth 0.2684 AU 104.4 LD 10.3 km/s
2032-09-25 09:19:00 Earth 0.3457 AU 134.5 LD 10.9 km/s
2033-05-22 14:55:00 Earth 0.0563 AU 21.9 LD 11.2 km/s
2034-05-19 18:01:00 Earth 0.3226 AU 125.5 LD 17.5 km/s
2040-05-16 18:42:00 Venus 0.0882 AU 34.3 LD 10.5 km/s
2048-01-11 15:37:00 Earth 0.423 AU 164.6 LD 19.2 km/s
2048-12-12 04:13:00 Earth 0.1835 AU 71.4 LD 13.5 km/s

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

Sources