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Asteroid Near-Earth

Ivar

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1627 Ivar (1929 SH)

Where is it now

Distance from Sun
1.985 AU
True anomaly
121.85°
Distance from Earth
1.463 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 Ivar — 1.985 AU from the Sun Ivar
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Ivar is 1.463 AU from Earth today (12.2 light-minutes).

In the sky

Right ascension
06h 08m 41s
Declination
+12° 33′ 28″
Constellation
Orion
Distance from Earth
1.46 AU
Elongation from the Sun
106.53° — well clear of the Sun

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
1.863 AU
Eccentricity
0.3973
Inclination
8.46°
Orbital period
2.54 years
Perihelion
1.123 AU
Aphelion
2.603 AU
Longitude of ascending node
133.07°
Argument of periapsis
167.83°
Epoch · J2000
2461200.5
Orbit class · AMO
Amor
Earth MOID · 42.9 LD
0.1101 AU
Tisserand (Jupiter)
3.879

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
14,546
Data arc
97.03 years
First observed
25 September 1929
Last observed
8 October 2026
Residual RMS
0.28 ″
Solution · Otto Matic
8 October 2026

Physical properties

Mean radius
4.56 km
Rotation period
4.8 hours

Visual & observation

Geometric albedo
0.15
Absolute magnitude (H)
12.79
Colour index (B–V)
0.87
Spectral type (SMASS)
S
Spectral type (Tholen)
S
Colour index (U–B)
0.46

Discovery & classification

Discovered by
Hertzsprung, E.
Discovery date
25 September 1929
Discovery site
Johannesburg

Also known as 1627 · 1929 SH · 1957 NA · 1957 XA

Amor Near-Earth Object Named

Close approaches 6 on record

Flyby geometry
Ecliptic flyby of Ivar at 2046-08-06 06:42 UTC Top-down view of the ecliptic, Earth at the centre, for the 2046-08-06 06:42 UTC close approach of Ivar. Catalogue miss distance 69.1 LD · 2.66 × 10⁷ km. The curve is the geocentric path from 2046-08-03 to 2046-08-09, 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 69.1 LD · 2.66 × 10⁷ km 2046-08-06 06:42 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2046-08-06 06:42 UTC close approach of Ivar. Catalogue miss distance 69.1 LD · 2.66 × 10⁷ km. The curve is the geocentric path from 2046-08-03 to 2046-08-09, 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
2046-08-06 06:42:00 Earth 0.1775 AU 69.1 LD 7.8 km/s
2074-08-03 16:48:00 Earth 0.1407 AU 54.8 LD 7 km/s
2102-08-06 04:18:00 Earth 0.157 AU 61.1 LD 7.3 km/s
2181-07-21 20:31:00 Earth 0.1665 AU 64.8 LD 6.8 km/s

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

Sources