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Asteroid Near-Earth

40267

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40267 (1999 GJ4)

Where is it now

Distance from Sun
2.327 AU
True anomaly
172.08°
Distance from Earth
3.214 AU
As of
11 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.

Orbit of Mercury Orbit of Venus Orbit of Mars Sun Earth — 0.998 AU from the Sun Earth 40267 — 2.327 AU from the Sun 40267
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 40267 is 3.214 AU from Earth today (26.7 light-minutes).

In the sky

Right ascension
12h 07m 01s
Declination
+09° 46′ 18″
Constellation
Virgo
Distance from Earth
3.21 AU
Elongation from the Sun
23.35° — 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
1.339 AU
Eccentricity
0.8084
Inclination
34.48°
Orbital period
565.8 days
Perihelion
0.257 AU
Aphelion
2.421 AU
Longitude of ascending node
148.2°
Argument of periapsis
211.95°
Epoch · J2000
2461200.5
Orbit class · APO
Apollo
Earth MOID · 60.8 LD
0.1563 AU
Tisserand (Jupiter)
4.379

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
3,897
Data arc
71.14 years
First observed
25 March 1955
Last observed
14 May 2026
Residual RMS
0.47 ″
Solution · Otto Matic
14 May 2026

Physical properties

Mean radius
0.82 km
Rotation period
4.96 hours

Visual & observation

Geometric albedo
0.214
Absolute magnitude (H)
15.54
Spectral type (SMASS)
Sq

Discovery & classification

Discovered by
LINEAR
Discovery date
10 April 1999
Discovery site
Socorro

Also known as 1999 GJ4

Apollo Near-Earth Object

Close approaches 8 on record

Flyby geometry
Ecliptic flyby of 40267 at 2051-02-04 23:10 UTC Top-down view of the ecliptic, Earth at the centre, for the 2051-02-04 23:10 UTC close approach of 40267. Catalogue miss distance 60.0 LD · 2.31 × 10⁷ km. The curve is the geocentric path from 2051-02-01 to 2051-02-07, 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 Moon’s position is approximate. The inset is a heliocentric view and is approximate. Sun 2 Feb 7 Feb 60.0 LD · 2.31 × 10⁷ km 2051-02-04 23:10 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2051-02-04 23:10 UTC close approach of 40267. Catalogue miss distance 60.0 LD · 2.31 × 10⁷ km. The curve is the geocentric path from 2051-02-01 to 2051-02-07, 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 Moon’s position is approximate. The inset is a heliocentric view and is approximate.

JPL Horizons

When (UTC) Body Distance Lunar distances Relative speed
2051-02-04 23:10:00 Earth 0.1543 AU 60.0 LD 30.7 km/s
2099-02-08 14:11:00 Earth 0.1691 AU 65.8 LD 33.3 km/s
2130-02-05 06:18:00 Earth 0.1513 AU 58.9 LD 30 km/s
2178-02-08 06:40:00 Earth 0.1455 AU 56.6 LD 32.2 km/s

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

Sources