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Asteroid Near-Earth Potentially hazardous

85713

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85713 (1998 SS49)

Where is it now

Distance from Sun
3.077 AU
True anomaly
170.41°
Distance from Earth
2.793 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 85713 — 3.077 AU from the Sun 85713
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 85713 is 2.793 AU from Earth today (23.2 light-minutes).

In the sky

Right ascension
20h 00m 04s
Declination
-32° 38′ 58″
Constellation
Sagittarius
Distance from Earth
2.8 AU
Elongation from the Sun
96.31° — well clear of the Sun

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
1.924 AU
Eccentricity
0.6388
Inclination
10.78°
Orbital period
2.67 years
Perihelion
0.695 AU
Aphelion
3.153 AU
Longitude of ascending node
40.94°
Argument of periapsis
103.15°
Epoch · J2000
2461200.5
Orbit class · APO
Apollo
Earth MOID · 1.7 LD
0.0045 AU
Tisserand (Jupiter)
3.624

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
1,516
Data arc
27.96 years
First observed
29 September 1998
Last observed
15 September 2026
Residual RMS
0.33 ″
Solution · Otto Matic
16 September 2026

Physical properties

Mean radius
1.74 km
Rotation period
2.26 hours

Visual & observation

Geometric albedo
0.076
Absolute magnitude (H)
15.77

Discovery & classification

Discovered by
LINEAR
Discovery date
29 September 1998
Discovery site
Socorro

Also known as 1998 SS49

Apollo Near-Earth Object Potentially Hazardous Asteroid

Close approaches 13 on record

Flyby geometry
Ecliptic flyby of 85713 at 2030-11-22 20:11 UTC Top-down view of the ecliptic, Earth at the centre, for the 2030-11-22 20:11 UTC close approach of 85713. Catalogue miss distance 48.8 LD · 1.88 × 10⁷ km. The curve is the geocentric path from 2030-11-19 to 2030-11-25, 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 48.8 LD · 1.88 × 10⁷ km 2030-11-22 20:11 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2030-11-22 20:11 UTC close approach of 85713. Catalogue miss distance 48.8 LD · 1.88 × 10⁷ km. The curve is the geocentric path from 2030-11-19 to 2030-11-25, 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
2030-11-22 20:11:00 Earth 0.1254 AU 48.8 LD 20.8 km/s
2038-11-21 18:05:00 Earth 0.1379 AU 53.7 LD 21.3 km/s
2046-11-21 09:00:00 Earth 0.1547 AU 60.2 LD 21.7 km/s
2054-11-20 15:12:00 Earth 0.1675 AU 65.2 LD 22.2 km/s

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

Sources