Asteroids

2025YR1 help

Last update: 2026-01-24 12:45 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.803

Aphelion (Q)

1.126

Eccentricity (e)

0.167

Inclination (i)

3.0

deg

Orbit period (P)

346.0

Earth MOID

0.00001

U parameter

4.3

Next Earth close approach

Date

2042-09-10

Nominal distance (from Earth center)

0.0408

6103735

Maximum Brightness

21.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.2

mag

Diameter

24 - 50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-12-17

Observatory

Pan-STARRS 1, Haleakala

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

0.964593

1-sigma variation

0.000002

Unit

Eccentricity (e)

Value

0.167256

1-sigma variation

0.000024

Unit

Inclination (i)

Value

2.9857

1-sigma variation

0.0004

Unit

Long. of Ascending Node (Ω)

Value

309.7451

1-sigma variation

0.0004

Unit

Arg. of Perihelion (ω)

Value

286.9655

1-sigma variation

0.0010

Unit

Mean Anomaly (M)

Value

196.08305

1-sigma variation

0.00150

Unit

Perihelion distance

Value

0.803259

1-sigma variation

Unit

Aphelion distance

Value

1.125926

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.121925

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.000028

1-sigma variation

Unit

MOID

Value

0.000007

1-sigma variation

Unit

Orbit Period

Value

346.0304

1-sigma variation

Unit

U parameter

Value

4.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.21900E-12	-4.96344E-11	-8.51802E-10	7.08734E-10	-2.02840E-9	-3.01270E-9
e	-4.96344E-11	5.89753E-10	1.01281E-8	-8.51497E-9	2.39503E-8	3.61345E-8
i	-8.51802E-10	1.01281E-8	1.73976E-7	-1.46720E-7	4.11516E-7	6.20946E-7
Ω	7.08734E-10	-8.51497E-9	-1.46720E-7	1.31969E-7	-3.47746E-7	-5.31003E-7
ω	-2.02840E-9	2.39503E-8	4.11516E-7	-3.47746E-7	9.81639E-7	1.45784E-6
M	-3.01270E-9	3.61345E-8	6.20946E-7	-5.31003E-7	1.45784E-6	2.23932E-6

Date of computation: 2026-01-24 12:45 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

25.23

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

24 - 50*

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

0.42742

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-12-17.513365

Unit

Source

[2]

Last Observation

Value

2026-01-22.610897

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

52 (0)

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 2025YR1 from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1951-09-19 18:55	6.5	0.1970510	0.1967087	0.0001141
EARTH	1952-08-08 16:49	142.3	0.1328343	0.1325330	0.0001005
EARTH	1952-10-15 00:01	105.2	0.1205587	0.1203363	0.0000741
EARTH	1954-01-25 06:40	29.6	0.0654758	0.0652424	0.0000778
EARTH	1970-09-14 14:46	75.0	0.0803191	0.0794575	0.0002875
EARTH	1972-01-01 01:15	213.5	0.1134114	0.1130535	0.0001193
EARTH	1972-03-05 01:18	326.1	0.1359820	0.1354515	0.0001769
EARTH	1973-01-25 00:41	10.4	0.1940884	0.1934107	0.0002259
EARTH	1988-09-11 00:18	4.9	0.0544360	0.0543945	0.0000138
EARTH	1989-12-23 10:54	92.3	0.1238816	0.1236905	0.0000637
EARTH	1990-03-16 20:17	145.2	0.1513710	0.1511240	0.0000824
EARTH	1991-01-25 19:11	4.7	0.1761434	0.1757010	0.0001475
EARTH	2006-08-16 21:51	351.1	0.1226002	0.1217860	0.0002716
EARTH	2006-10-08 20:19	328.0	0.1130989	0.1125302	0.0001896
EARTH	2008-01-21 13:05	206.4	0.0746407	0.0734735	0.0003891
EARTH	2023-09-17 20:46	< 1 min	0.1749158	0.1748097	0.0000354
EARTH	2024-07-30 02:33	44.1	0.1458244	0.1457032	0.0000404
EARTH	2024-10-21 08:25	31.2	0.1293339	0.1292375	0.0000321
EARTH	2026-01-27 15:41	< 1 min	0.0498450	0.0498247	0.0000068
EARTH	2042-09-10 07:36	4.7	0.0408010	0.0400647	0.0002496
EARTH	2043-12-14 10:45	398.3	0.1346927	0.1343329	0.0001199
EARTH	2044-03-26 10:59	603.7	0.1668279	0.1662478	0.0001934
EARTH	2045-01-25 23:11	25.7	0.1399787	0.1384273	0.0005171
EARTH	2060-09-11 04:36	72.6	0.0455341	0.0424727	0.0010669
EARTH	2061-06-23 11:14	> 1 d	0.1946964	0.1935979	0.0003668
EARTH	2061-11-25 23:28	1246.6	0.1477788	0.1475768	0.0000677
EARTH	2062-04-16 00:25	> 1 d	0.1914793	0.1904230	0.0003521
EARTH	2063-01-29 16:01	41.2	0.0591477	0.0552411	0.0013022
EARTH	2078-09-15 19:55	172.3	0.1327599	0.1207258	0.0040254
EARTH	2079-07-17 22:36	> 1 d	0.1650153	0.1592776	0.0019277
EARTH	2079-11-02 20:54	> 1 d	0.1404503	0.1376392	0.0009389
EARTH	2081-01-29 17:57	187.5	0.0184430	0.0045704	0.0046708
EARTH	2098-09-11 13:31	> 1 d	0.0733574	0.0326609	0.1047703
EARTH	2099-07-06 15:49	> 1 mo	0.1764586	0.1010242	0.0389532
EARTH	2099-11-09 07:51	> 1 mo	0.1482095	0.1098700	0.0145265
EARTH	2101-01-30 10:57	> 1 d	0.0321532	0.0025351	0.1054089
EARTH	2119-09-14 04:06	> 1 w	0.1286769	0.0323763	0.8870282
EARTH	2120-07-28 22:54	> 1 mo	0.1422173	0.0697012	0.5492498
EARTH	2120-10-17 08:26	> 1 mo	0.1295706	0.0277128	0.3872053
EARTH	2122-01-03 02:17	> 1 mo	0.1120387	0.0287163	0.5184447
EARTH	2122-03-04 07:32	> 1 mo	0.1319111	0.0246781	0.7139463
EARTH	2123-01-27 18:41	> 1 w	0.1483611	0.0020040	0.8825478

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
262.52691535	28.01900378	0.00000739	MINIMUM
102.51104517	248.03506426	0.03360213	MINIMUM
181.48139990	317.27478319	0.14732059	SADDLE
3.43517704	138.67530314	0.21486666	SADDLE
4.45438218	319.92433405	1.79070242	SADDLE
183.59440647	139.05650787	2.13877682	MAXIMUM

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MOID Plots

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