Asteroids

2025RU1 help

Last update: 2025-09-10 09:56 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.718

Aphelion (Q)

1.164

Eccentricity (e)

0.237

Inclination (i)

7.4

deg

Orbit period (P)

333.3

Earth MOID

0.00206

U parameter

5.7

Next Earth close approach

Date

2035-07-24

Nominal distance (from Earth center)

0.17417

26055840

Maximum Brightness

25.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

27.7

mag

Diameter

8 - 17*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-09-02

Observatory

Palomar Mountain--ZTF

ORBIT VISUALISATION TOOLS

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.940782

1-sigma variation

0.000017

Unit

Eccentricity (e)

Value

0.236773

1-sigma variation

0.000136

Unit

Inclination (i)

Value

7.3888

1-sigma variation

0.0055

Unit

Long. of Ascending Node (Ω)

Value

160.3843

1-sigma variation

2.405E-5

Unit

Arg. of Perihelion (ω)

Value

301.5331

1-sigma variation

0.0019

Unit

Mean Anomaly (M)

Value

348.94282

1-sigma variation

0.01561

Unit

Perihelion distance

Value

0.718031

1-sigma variation

Unit

Aphelion distance

Value

1.163534

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.201558

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.004040

1-sigma variation

Unit

MOID

Value

0.002061

1-sigma variation

Unit

Orbit Period

Value

333.2976

1-sigma variation

Unit

U parameter

Value

5.7

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.73821E-10	-2.23160E-9	-9.05775E-8	-3.83094E-10	-3.15819E-8	-2.56138E-7
e	-2.23160E-9	1.84077E-8	7.46881E-7	3.20345E-9	2.53294E-7	2.11769E-6
i	-9.05775E-8	7.46881E-7	3.03062E-5	1.29875E-7	1.02858E-5	8.59182E-5
Ω	-3.83094E-10	3.20345E-9	1.29875E-7	5.78608E-10	4.26593E-8	3.69497E-7
ω	-3.15819E-8	2.53294E-7	1.02858E-5	4.26593E-8	3.71864E-6	2.89813E-5
M	-2.56138E-7	2.11769E-6	8.59182E-5	3.69497E-7	2.89813E-5	2.43735E-4

Date of computation: 2025-09-10 09:56 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

Unit

Source

[-]

Quality

Value

Unit

Source

[-]

Amplitude

Value

Unit

mag

Source

[-]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

27.706

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

8 - 17*

Unit

Source

[2]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Unit

Source

[-]

Download this part as:

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

1.32785

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-09-01.301446

Unit

Source

[2]

Last Observation

Value

2025-09-04.219164

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

17 (3)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

Unit

Source

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close Approaches for 2025RU1 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1952-04-23 15:15	> 1 d	0.1185996	0.1155033	0.0058040
EARTH	1953-08-31 20:04	948.9	0.1498812	0.0801182	0.0232557
EARTH	1961-07-19 05:37	> 1 d	0.1727493	0.1647603	0.0027450
EARTH	1969-05-05 21:42	83.1	0.1737278	0.1728649	0.0002877
EARTH	1970-09-03 23:45	25.5	0.0148578	0.0125801	0.0007598
EARTH	1978-05-03 21:19	49.3	0.1618138	0.1609584	0.0002865
EARTH	1979-09-03 20:30	5.4	0.0289675	0.0285062	0.0001538
EARTH	1988-08-12 11:39	172.3	0.1345066	0.1334497	0.0003524
EARTH	1997-07-06 21:38	320.9	0.1845119	0.1838505	0.0002207
EARTH	2006-04-01 09:42	216.2	0.1569505	0.1564367	0.0001724
EARTH	2007-08-30 16:00	34.5	0.1919209	0.1894204	0.0008335
EARTH	2015-04-24 09:50	22.5	0.1137233	0.1135454	0.0000595
EARTH	2016-09-02 12:37	18.3	0.0852185	0.0834369	0.0005939
EARTH	2024-04-30 18:31	37.4	0.1379561	0.1374883	0.0001574
EARTH	2025-09-03 22:20	< 1 min	0.0044736	0.0044648	0.0000030
EARTH	2035-07-24 01:19	1030.3	0.1741725	0.1727176	0.0004872
EARTH	2045-04-11 01:07	850.2	0.1252538	0.1208331	0.0015637
EARTH	2046-09-04 00:24	58.0	0.0374861	0.0292053	0.0027635
EARTH	2055-04-28 20:51	176.4	0.1393486	0.1335748	0.0019902
EARTH	2056-08-26 23:01	1161.5	0.0937120	0.0821906	0.0038478
EARTH	2066-07-12 04:37	> 1 d	0.1860424	0.1801430	0.0020317
EARTH	2076-04-09 13:51	> 1 d	0.1304355	0.1154414	0.0068260
EARTH	2077-09-03 06:38	443.3	0.0617530	0.0185574	0.0144776
EARTH	2086-04-25 09:00	419.5	0.1144598	0.1110251	0.0013023
EARTH	2087-09-03 04:08	202.6	0.0438035	0.0366660	0.0023819
EARTH	2097-07-14 06:55	> 1 d	0.1841851	0.1741306	0.0035323
EARTH	2107-04-10 16:11	> 1 w	0.1314185	0.1128584	0.0164759
EARTH	2108-09-04 02:16	976.1	0.0603007	0.0049197	0.0333979
EARTH	2117-04-27 21:10	1183.9	0.1255872	0.1122161	0.0058890
EARTH	2118-08-31 23:50	> 1 d	0.0739865	0.0530489	0.0070043

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
251.79450843	240.71022771	0.00206119	MINIMUM
96.08608290	108.93394125	0.10725084	MINIMUM
169.76479517	172.62711161	0.19137768	SADDLE
353.79046230	353.05420785	0.28234744	SADDLE
358.94848310	179.49403449	1.73362636	SADDLE
180.90410931	1.56081613	2.14389536	MAXIMUM

Download:

MOID Plots

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