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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 5:04 
Transit: 13:06 
Sunset: 21:07
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Dwarf Planets and Asteroids » 

Asteroid 1998 OR2

Above the horizon.  Rise: 0:17 | Tran: 7:10 | Set: 13:58
Alt: 47.96°   Az: 168.49°   Direction: South-South-East

Asteroid 1998 OR2 is in the constellation of Pisces, at a distance of 543,444,075.0 kilometers from Earth. The current Right Ascension is 01h 51m 25s and the Declination is +09° 55’ 22” (apparent coordinates). The magnitude of asteroid 1998 OR2 is 22.55.

Finder Charts

The sky charts below show, at different resolutions, the position of asteroid 1998 OR2 in the sky. Click on each chart to access the interactive star map tool.

Star map showing the position of asteroid 1998 OR2 in the constellation of Pisces on F, d Y. Field of view: 50x30 degrees. View interactive star map.
Star map showing the position of asteroid 1998 OR2 in the constellation of Pisces on F, d Y. Field of view: 15x9 degrees. View in interactive star map.

The following map uses photographic imagery from the Digitized Sky Survey (DSS) to realistically visualize the precise position of asteroid 1998 OR2 against the stars in the background. The horizontal size of the map measures 60 arcminutes. Click on the image to access a more detailed full-screen view.

1998 OR2
RA: 01h 50m 04s
Dec: +09° 47’ 49”
Simplified high-resolution deep sky chart showing the current position of asteroid 1998 OR2. Field of view: 60 x 40 arcminutes. Go to the dedicated page

Equatorial Coordinates

Apparent

01h 51m 25s
+09° 55’ 22”
23h 28m 48s
01h 20m 14s

J2000

01h 50m 04s
+09° 47’ 49”

Additional Information

Pisces
22.55

Rise and Set Times

The following table lists today's rise, transit and set times of asteroid 1998 OR2 from Greenwich, UK (all times relative to the local timezone Europe/London):

Azimuth: 80.0°
Max altitude: 48.4°
Azimuth: 279.9°

If you need to access this information frequently for your observations, you can create a simple customized Quick Access page, so that you can easily bookmark it in your browser favorites or add a shortcut to your mobile phones' home screen.

Distance from Earth

The distance of asteroid 1998 OR2 from Earth is currently 543,444,075.0 kilometers, equivalent to 3.6326992654 Astronomical Units. Light takes 30m 12.734s to travel from asteroid 1998 OR2 and arrive to us.

543,444,075.0
3.6326992654
30m 12.734s

The following graph shows the distance of asteroid 1998 OR2 from Earth as a function of time. In the chart the distance is measured in Astronomical Units and the data is sampled with an interval of 1 day.

Chart of the distance of asteroid 1998 OR2 from Earth in Astronomical Units (au)
Note: The values in this chart may not be entirely accurate around the time of closest approach for objects passing very close to Earth at high speed (e.g., Near-Earth Objects).

The value of the distance of 1998 OR2 from Earth is also available as a real time updated value in the live position tracker.

Closest Approach to Earth

In the period between January 1, 2013 and December 30, 2100, the closest approach of asteroid 1998 OR2 to Earth will happen on Monday 17 April 2079 at a distance of 0.012028 Astronomical Units, or 1,799,340 kilometers:

Monday 17 April 2079
1,799,340
0.012028

Note: the values for the closest approach are computed with a sampling interval of 1 day.

Light Curve

The following chart shows the light curve of asteroid 1998 OR2, i.e., its apparent magnitude as a function of time. The curve is calculated using the latest ephemerides provided by JPL Horizons. The magnitude data is sampled with the interval of 2 days. Because of this sampling, inaccuracies may occur for objects that have large variations of brightness over a few days. For comets, large discrepancies can arise between the calculated brightness and the observations due to their highly dynamic, and not always precisely predictable, behavior.

Chart of the magnitude of asteroid 1998 OR2 as a function of time

Orbital Elements

The following table lists the orbital elements of asteroid 1998 OR2 at epoch February, 24 2023 00:00 UTC (JD: 2460000.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.57540175
Orbit inclination i 5.87820372°
Perihelion distance q 1.01074111 AU
151,204,719 km
Aphelion distance Q 3.75018813 AU
561,020,160 km
Semi-major axis a 2.38046462 AU
356,112,439 km
Orbital period period 3.6728 years
1,341.5011 days
Date of perihelion transit Tp December 19, 2023
2,460,298.0192 JD
Next perihelion transit August 22, 2027
2,461,639.5203 JD
Argument of perihelion peri 174.5804742614°
Longitude of the ascending node node 26.941546107138°
Mean anomaly M 280.1589026554°
Mean motion n 0.26835610°/day

Orbit Visualization

The following chart is a 3D animated visualization of the orbit of asteroid 1998 OR2 relative to the other major objects in the Solar System. You can access more advanced features using our 3D Solar System Viewer.

15 Days Ephemeris

The following table lists the ephemerides of asteroid 1998 OR2 computed for the past and next 7 days, with a 24 hours interval. Apparent celestial coordinates are provided.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
Jul 10 2025 01h 48m 16s +09° 36’ 16” 22.59 Pisces
Jul 11 2025 01h 48m 44s +09° 39’ 09” 22.59 Pisces
Jul 12 2025 01h 49m 12s +09° 41’ 56” 22.58 Pisces
Jul 13 2025 01h 49m 39s +09° 44’ 40” 22.57 Pisces
Jul 14 2025 01h 50m 06s +09° 47’ 19” 22.57 Pisces
Jul 15 2025 01h 50m 31s +09° 49’ 53” 22.56 Pisces
Jul 16 2025 01h 50m 56s +09° 52’ 23” 22.55 Pisces
Jul 17 2025 01h 51m 20s +09° 54’ 48” 22.55 Pisces
Jul 18 2025 01h 51m 43s +09° 57’ 10” 22.54 Pisces
Jul 19 2025 01h 52m 05s +09° 59’ 25” 22.53 Pisces
Jul 20 2025 01h 52m 27s +10° 01’ 37” 22.52 Pisces
Jul 21 2025 01h 52m 47s +10° 03’ 44” 22.52 Pisces
Jul 22 2025 01h 53m 07s +10° 05’ 46” 22.51 Pisces
Jul 23 2025 01h 53m 26s +10° 07’ 43” 22.50 Pisces

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