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Asteroid Near-Earth

2013 RO5

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(2013 RO5)

Where is it now

Distance from Sun
1.012 AU
True anomaly
165.22°
Distance from Earth
1.04 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 2013 RO5 — 1.012 AU from the Sun 2013 RO5
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2013 RO5 is 1.04 AU from Earth today (8.6 light-minutes).

In the sky

Right ascension
17h 29m 16s
Declination
-26° 21′ 43″
Constellation
Ophiuchus
Distance from Earth
1.04 AU
Elongation from the Sun
59.54° — 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
0.757 AU
Eccentricity
0.3609
Inclination
10.08°
Orbital period
240.7 days
Perihelion
0.484 AU
Aphelion
1.031 AU
Longitude of ascending node
339.56°
Argument of periapsis
176.03°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 7.6 LD
0.0194 AU
Tisserand (Jupiter)
7.571

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
91
Data arc
6 days
First observed
1 September 2013
Last observed
7 September 2013
Residual RMS
0.47 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
24.8

Discovery & classification

Aten Near-Earth Object

Close approaches 155 on record

Flyby geometry
Ecliptic flyby of 2013 RO5 at 2033-01-28 09:49 UTC Top-down view of the ecliptic, Earth at the centre, for the 2033-01-28 09:49 UTC close approach of 2013 RO5. Catalogue miss distance 190.4 LD · 7.32 × 10⁷ km. The curve is the geocentric path from 2033-01-25 to 2033-01-31, 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 190.4 LD · 7.32 × 10⁷ km 2033-01-28 09:49 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2033-01-28 09:49 UTC close approach of 2013 RO5. Catalogue miss distance 190.4 LD · 7.32 × 10⁷ km. The curve is the geocentric path from 2033-01-25 to 2033-01-31, 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
2033-01-28 09:49:00 Earth 0.4892 AU 190.4 LD 19.2 km/s
2034-08-17 03:14:00 Earth 0.4421 AU 172.0 LD 21.3 km/s
2035-01-15 00:19:00 Earth 0.4713 AU 183.4 LD 17.1 km/s
2035-03-18 14:48:00 Venus 0.125 AU 48.6 LD 11.6 km/s
2036-08-12 13:47:00 Earth 0.319 AU 124.2 LD 17.1 km/s
2036-12-30 08:57:00 Earth 0.4443 AU 172.9 LD 14.2 km/s
2038-08-10 17:27:00 Earth 0.1998 AU 77.8 LD 13 km/s
2038-12-12 19:59:00 Earth 0.4037 AU 157.1 LD 10 km/s
2040-08-12 21:18:00 Earth 0.0952 AU 37.0 LD 9.4 km/s
2044-06-08 20:50:00 Venus 0.121 AU 47.1 LD 12.8 km/s

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

Sources