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Asteroid Near-Earth

2025 OB

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(2025 OB)

Where is it now

Distance from Sun
1.181 AU
True anomaly
182.12°
Distance from Earth
1.86 AU
As of
16 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 — 0.997 AU from the Sun Earth 2025 OB — 1.181 AU from the Sun 2025 OB
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2025 OB is 1.86 AU from Earth today (15.5 light-minutes).

In the sky

Right ascension
15h 37m 46s
Declination
-24° 07′ 15″
Constellation
Libra
Distance from Earth
1.86 AU
Elongation from the Sun
34.35° — 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
0.782 AU
Eccentricity
0.5121
Inclination
14.44°
Orbital period
252.4 days
Perihelion
0.381 AU
Aphelion
1.182 AU
Longitude of ascending node
295.72°
Argument of periapsis
147.46°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 0.3 LD
0.0009 AU
Tisserand (Jupiter)
7.302

Orbit quality

Orbit reasonably well determined (uncertainty code 5).

Observations used
22
Data arc
3 days
First observed
16 July 2025
Last observed
19 July 2025
Residual RMS
0.33 ″
Solution · Otto Matic
28 July 2026

Visual & observation

Absolute magnitude (H)
25.99

Discovery & classification

Listed by JPL impact monitoring; see the Sentry table for current probabilities.

Aten Near-Earth Object

Close approaches 53 on record

Flyby geometry
Ecliptic flyby of 2025 OB at 2034-07-18 02:17 UTC Top-down view of the ecliptic, Earth at the centre, for the 2034-07-18 02:17 UTC close approach of 2025 OB. Catalogue miss distance 30.6 LD · 1.18 × 10⁷ km. The curve is the geocentric path from 2034-07-15 to 2034-07-21, 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 30.6 LD · 1.18 × 10⁷ km 2034-07-18 02:17 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2034-07-18 02:17 UTC close approach of 2025 OB. Catalogue miss distance 30.6 LD · 1.18 × 10⁷ km. The curve is the geocentric path from 2034-07-15 to 2034-07-21, 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
2029-10-09 13:26:00 Venus 0.1376 AU 53.6 LD 18.9 km/s
2034-07-18 02:17:00 Earth 0.0786 AU 30.6 LD 16.5 km/s
2035-04-22 23:51:00 Venus 0.1392 AU 54.2 LD 21.3 km/s
2038-03-09 14:43:00 Merc 0.0741 AU 28.8 LD 18.7 km/s
2038-03-09 14:43:00 Mercury 0.0741 AU 28.8 LD 18.7 km/s
2043-07-15 18:15:00 Earth 0.1833 AU 71.3 LD 19.6 km/s
2045-07-05 10:54:00 Earth 0.1677 AU 65.3 LD 11.5 km/s
2048-07-16 08:32:00 Mercury 0.0941 AU 36.6 LD 19.3 km/s
2048-07-16 08:32:00 Merc 0.0941 AU 36.6 LD 19.3 km/s
2054-07-15 04:53:00 Earth 0.0937 AU 36.5 LD 12.2 km/s

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

Sources