Asteroids

2025BT1 help

Last update: 2025-02-23 10:01 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Aten

Perihelion (q)

0.721

Aphelion (Q)

1.090

Eccentricity (e)

0.204

Inclination (i)

23.4

deg

Orbit period (P)

314.8

Earth MOID

0.01788

U parameter

5.9

Next Earth close approach

Date

2025-02-24

Nominal distance (from Earth center)

0.05234

7829637

Maximum Brightness

19.4

mag

Risk

Object is not in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

21.6

mag

Diameter

130 - 290*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-01-20

Observatory

Mt. Lemmon Survey

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.905604

1-sigma variation

0.000019

Unit

Eccentricity (e)

Value

0.203750

1-sigma variation

0.000026

Unit

Inclination (i)

Value

23.4167

1-sigma variation

0.0047

Unit

Long. of Ascending Node (Ω)

Value

338.1025

1-sigma variation

0.0005

Unit

Arg. of Perihelion (ω)

Value

301.2343

1-sigma variation

0.0084

Unit

Mean Anomaly (M)

Value

340.40988

1-sigma variation

0.01038

Unit

Perihelion distance

Value

0.721087

1-sigma variation

Unit

Aphelion distance

Value

1.090121

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.223872

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.020101

1-sigma variation

Unit

MOID

Value

0.017877

1-sigma variation

Unit

Orbit Period

Value

314.7791

1-sigma variation

Unit

U parameter

Value

5.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.65905E-10	5.03962E-10	8.94527E-8	1.03754E-8	-1.61447E-7	1.98508E-7
e	5.03962E-10	6.96275E-10	1.23487E-7	1.42761E-8	-2.22506E-7	2.73853E-7
i	8.94527E-8	1.23487E-7	2.19064E-5	2.53439E-6	-3.94874E-5	4.85876E-5
Ω	1.03754E-8	1.42761E-8	2.53439E-6	2.94595E-7	-4.57719E-6	5.62585E-6
ω	-1.61447E-7	-2.22506E-7	-3.94874E-5	-4.57719E-6	7.12448E-5	-8.76170E-5
M	1.98508E-7	2.73853E-7	4.85876E-5	5.62585E-6	-8.76170E-5	1.07786E-4

Date of computation: 2025-02-20 11:58 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

21.589

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

130 - 290*

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

0.5448

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-01-20.500511

Unit

Source

[2]

Last Observation

Value

2025-02-19.515586

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

74 (1)

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 2025BT1 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
VENUS	1954-09-22 22:40	289.6	0.0421109	0.0386773	0.0029999
EARTH	1956-02-22 00:10	223.0	0.1466047	0.1305858	0.0053456
VENUS	1959-01-13 07:48	165.6	0.0386775	0.0386298	0.0002028
EARTH	1962-02-26 21:30	82.9	0.0524836	0.0443854	0.0027314
VENUS	1963-05-05 19:24	122.8	0.0467236	0.0426103	0.0015960
EARTH	1981-02-24 11:28	93.0	0.0482839	0.0417760	0.0021928
EARTH	1987-02-28 10:11	23.5	0.1894324	0.1811614	0.0027571
EARTH	2000-02-21 21:12	145.5	0.1581800	0.1482473	0.0033120
EARTH	2006-02-27 12:20	68.8	0.0781576	0.0690065	0.0030594
EARTH	2025-02-24 10:46	< 1 min	0.0523379	0.0523077	0.0000101
EARTH	2031-02-28 12:09	13.9	0.1347106	0.1313397	0.0011238
EARTH	2056-02-23 12:40	135.3	0.1049128	0.0954165	0.0031707
EARTH	2062-02-26 01:36	88.5	0.0197641	0.0190650	0.0006692
EARTH	2068-02-28 16:44	137.6	0.1207778	0.0939898	0.0089499
EARTH	2099-02-23 00:56	1202.4	0.1161986	0.0353407	0.0278503
EARTH	2105-02-26 23:00	869.1	0.0197736	0.0189182	0.0072174
EARTH	2111-03-01 19:47	727.6	0.1478789	0.0119667	0.0877248

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
248.08791071	54.00354933	0.01787734	MINIMUM
61.65251814	249.62283219	0.20640919	MINIMUM
148.95423936	332.59402289	0.42073663	SADDLE
339.46544428	151.87198531	0.44757676	SADDLE
351.80877831	348.47773864	1.67697855	SADDLE
190.57879334	188.02330098	2.07792008	MAXIMUM

Download:

MOID Plots

Click on the images to zoom-in and zoom-out