Asteroids

2025PY1 help

Last update: 2025-08-16 12:45 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.855

Aphelion (Q)

1.361

Eccentricity (e)

0.228

Inclination (i)

4.3

deg

Orbit period (P)

425.9

Earth MOID

0.00008

U parameter

6.1

Next Earth close approach

Date

2025-08-18

Nominal distance (from Earth center)

0.00197

295335

Maximum Brightness

16.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

27.7

mag

Diameter

8 - 17*

Taxonomic type

Rotation period (T)

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

1.107813

1-sigma variation

0.000045

Unit

Eccentricity (e)

Value

0.228169

1-sigma variation

0.000104

Unit

Inclination (i)

Value

4.3328

1-sigma variation

0.0025

Unit

Long. of Ascending Node (Ω)

Value

145.3635

1-sigma variation

0.0004

Unit

Arg. of Perihelion (ω)

Value

260.8381

1-sigma variation

0.0080

Unit

Mean Anomaly (M)

Value

23.92650

1-sigma variation

0.00168

Unit

Perihelion distance

Value

0.855044

1-sigma variation

Unit

Aphelion distance

Value

1.360582

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.101380

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.000245

1-sigma variation

Unit

MOID

Value

0.000084

1-sigma variation

Unit

Orbit Period

Value

425.8907

1-sigma variation

Unit

U parameter

Value

6.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.02005E-9	4.46165E-9	1.04465E-7	-7.39698E-10	2.72411E-7	1.23844E-8
e	4.46165E-9	1.07766E-8	2.58618E-7	9.59585E-9	7.59506E-7	-2.30683E-8
i	1.04465E-7	2.58618E-7	6.24616E-6	3.01104E-7	1.88614E-5	-8.84787E-7
Ω	-7.39698E-10	9.59585E-9	3.01104E-7	1.41099E-7	1.82170E-6	-6.21726E-7
ω	2.72411E-7	7.59506E-7	1.88614E-5	1.82170E-6	6.37514E-5	-6.96037E-6
M	1.23844E-8	-2.30683E-8	-8.84787E-7	-6.21726E-7	-6.96037E-6	2.83614E-6

Date of computation: 2025-08-16 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

27.697

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

0.768594

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-08-14.310818

Unit

Source

[2]

Last Observation

Value

2025-08-16.16848

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

41 (2)

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 2025PY1 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	1950-08-13 22:05	> 1 w	0.0780967	0.0012512	0.4357695
EARTH	1952-02-08 05:22	> 1 w	0.0980127	0.0168868	0.4705641
EARTH	1961-01-01 09:01	> 1 mo	0.1251272	0.0137425	0.2546086
EARTH	1969-07-24 22:49	> 1 mo	0.1905713	0.0422991	0.1207728
EARTH	1969-10-12 12:35	> 1 mo	0.1511128	0.0660093	0.0561696
EARTH	1978-08-15 15:38	> 1 d	0.0506920	0.0010101	0.0803542
EARTH	1980-02-09 12:36	> 1 d	0.1148573	0.0148939	0.0926835
EARTH	1988-12-07 12:21	> 1 mo	0.1552513	0.0455807	0.0372578
EARTH	1989-03-02 07:36	> 1 mo	0.1888296	0.0652900	0.0876169
EARTH	1997-08-26 03:20	> 1 w	0.0680607	0.0024186	0.1369924
EARTH	2006-08-09 02:30	817.6	0.1763861	0.0962882	0.0267147
EARTH	2008-02-03 09:59	650.4	0.0173038	0.0167682	0.0019502
EARTH	2016-11-09 13:20	> 1 d	0.1675727	0.1675216	0.0000177
EARTH	2025-08-18 22:09	< 1 min	0.0019737	0.0019711	0.0000009
EARTH	2032-08-16 14:55	214.1	0.0229976	0.0169750	0.0020076
EARTH	2048-01-27 19:07	> 1 d	0.0738183	0.0288483	0.0248726
EARTH	2055-01-13 04:26	> 1 d	0.0905297	0.0381357	0.0185642
EARTH	2061-11-03 17:25	> 1 d	0.1533463	0.1525306	0.0002758
EARTH	2068-09-02 12:50	> 1 d	0.0848119	0.0691187	0.0052478
EARTH	2075-08-15 18:57	> 1 d	0.0485976	0.0010688	0.0164048
EARTH	2091-01-25 04:15	> 1 d	0.0338663	0.0287326	0.0145445
EARTH	2097-12-30 02:12	> 1 mo	0.1115703	0.0112018	0.0527002
EARTH	2104-11-06 16:03	> 1 mo	0.1535308	0.1521419	0.0011576
EARTH	2111-09-19 15:31	> 1 mo	0.1116779	0.0256132	0.0739205
EARTH	2118-08-20 17:07	> 1 w	0.0030233	0.0020218	0.0702627

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
291.99091887	224.79182069	0.00008346	MINIMUM
63.29304866	20.33564351	0.03120487	MINIMUM
357.81854376	303.07787470	0.15225008	SADDLE
178.12571405	122.76092271	0.36090686	SADDLE
355.87343288	120.66222431	1.86391160	SADDLE
177.26745902	302.08535606	2.35019904	MAXIMUM

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MOID Plots

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