Orbital Mechanics Datasets
Collection
Satellites, TLEs, launches, NEOs, and asteroids. Track every orbiting object from NORAD SATCAT to Starlink fleet health and JPL impact risk. • 47 items • Updated
asteroid_number int64 2 640k ⌀ | proper_a_au float64 1.84 5.33 | proper_e float64 0 0.3 | sin_i float64 0 0.57 | abs_mag float64 3.31 100 | c_param float64 -37.82 51.8 ⌀ | freq_g_arcsec_yr float64 -961.31 984 ⌀ | freq_s_arcsec_yr float64 -183.42 -19.84 ⌀ | n_oppositions int64 1 105 ⌀ | packed_name stringlengths 5 7 ⌀ | unpacked_name stringlengths 1 9 ⌀ | family_number int64 0 485k | family_name stringclasses 266
values | region stringclasses 7
values | source stringdate 2015-01-01 00:00:00 2024-01-01 00:00:00 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
153 | 3.96525 | 0.17372 | 0.155 | 7.45 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
1,038 | 3.96484 | 0.16397 | 0.1433 | 10.41 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
1,212 | 3.9674 | 0.2299 | 0.12597 | 9.44 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
1,529 | 3.96427 | 0.15392 | 0.13692 | 9.88 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
1,746 | 3.96314 | 0.14101 | 0.16076 | 9.81 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
3,134 | 3.9658 | 0.18375 | 0.15585 | 10.48 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
3,561 | 3.96231 | 0.13259 | 0.14921 | 10.93 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
3,571 | 3.96199 | 0.12718 | 0.16006 | 10.89 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
3,990 | 3.96507 | 0.16844 | 0.16747 | 10.78 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
4,317 | 3.967 | 0.21341 | 0.15928 | 10.91 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
5,928 | 3.96446 | 0.16028 | 0.15133 | 11.42 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
6,124 | 3.96613 | 0.19151 | 0.15089 | 12.04 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
11,175 | 3.96292 | 0.13946 | 0.151 | 12.71 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
11,388 | 3.96444 | 0.15715 | 0.15172 | 11.05 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
13,897 | 3.96313 | 0.13775 | 0.15371 | 12.24 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
14,195 | 3.96594 | 0.18741 | 0.15393 | 11.67 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
15,373 | 3.96125 | 0.12161 | 0.15527 | 12.69 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
15,505 | 3.9657 | 0.17876 | 0.14392 | 11.33 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
15,638 | 3.96352 | 0.14547 | 0.14555 | 11.19 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
16,232 | 3.96478 | 0.16451 | 0.15357 | 12.47 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
16,915 | 3.96623 | 0.19329 | 0.13827 | 11.75 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
17,212 | 3.96663 | 0.20501 | 0.15187 | 12.31 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
17,428 | 3.96507 | 0.16769 | 0.16657 | 11.18 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
21,128 | 3.96532 | 0.17132 | 0.15404 | 11.85 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
26,929 | 3.96727 | 0.22069 | 0.14999 | 13.18 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
31,284 | 3.96586 | 0.18698 | 0.14409 | 12.62 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
31,338 | 3.96232 | 0.13179 | 0.15417 | 12.93 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
32,455 | 3.9665 | 0.20158 | 0.15665 | 12.71 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
32,724 | 3.96476 | 0.16445 | 0.15266 | 13.23 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
35,016 | 3.96511 | 0.17107 | 0.15586 | 13.35 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
35,630 | 3.96623 | 0.19492 | 0.15137 | 12.6 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
37,155 | 3.96128 | 0.12094 | 0.15529 | 12.96 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
37,452 | 3.96458 | 0.16144 | 0.14772 | 13.93 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
37,590 | 3.96624 | 0.19423 | 0.14643 | 12.9 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
38,470 | 3.96363 | 0.14785 | 0.13965 | 13.03 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
38,701 | 3.96612 | 0.19199 | 0.15009 | 11.71 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
39,282 | 3.96648 | 0.20205 | 0.14447 | 12.02 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
40,227 | 3.96659 | 0.20273 | 0.16463 | 12.65 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
41,278 | 3.96627 | 0.19518 | 0.15744 | 12.74 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
41,365 | 3.96482 | 0.16413 | 0.15502 | 12.43 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
41,488 | 3.96414 | 0.15433 | 0.15757 | 12.16 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
42,190 | 3.96364 | 0.14769 | 0.15568 | 12.82 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
42,237 | 3.96236 | 0.12728 | 0.16164 | 12.23 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
45,850 | 3.96117 | 0.11842 | 0.16477 | 12.36 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
51,178 | 3.96519 | 0.17285 | 0.15249 | 12.41 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
51,930 | 3.96542 | 0.1771 | 0.15339 | 12.75 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
51,983 | 3.96089 | 0.11801 | 0.1604 | 12.85 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
54,630 | 3.96389 | 0.1509 | 0.15941 | 12.53 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
54,644 | 3.96176 | 0.12681 | 0.1336 | 12.76 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
56,982 | 3.96607 | 0.18965 | 0.15737 | 12.92 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
56,996 | 3.96551 | 0.17783 | 0.15047 | 12.66 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
60,232 | 3.96409 | 0.15403 | 0.14876 | 13.78 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
61,042 | 3.9667 | 0.20678 | 0.143 | 12.59 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
62,145 | 3.96372 | 0.14964 | 0.14976 | 12.76 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
62,408 | 3.96639 | 0.19856 | 0.15091 | 12.81 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
63,184 | 3.96104 | 0.11798 | 0.14419 | 12.49 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
63,249 | 3.9631 | 0.13691 | 0.15331 | 12.68 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
65,244 | 3.96657 | 0.2001 | 0.13844 | 12.92 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
65,374 | 3.96671 | 0.2079 | 0.15332 | 12.77 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
66,187 | 3.96661 | 0.19874 | 0.1563 | 11.98 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
66,227 | 3.96698 | 0.2158 | 0.14734 | 13 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
67,246 | 3.96491 | 0.1645 | 0.15838 | 12.63 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
67,340 | 3.96471 | 0.1639 | 0.15043 | 12.44 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
67,368 | 3.96672 | 0.20882 | 0.1435 | 12.3 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
68,374 | 3.96325 | 0.14047 | 0.16032 | 13.08 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
68,402 | 3.9622 | 0.12948 | 0.15758 | 13.09 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
73,436 | 3.96277 | 0.13624 | 0.1502 | 13.24 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
73,455 | 3.96526 | 0.17094 | 0.15569 | 13.59 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
73,457 | 3.96644 | 0.19764 | 0.15375 | 12.63 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
73,458 | 3.96224 | 0.1311 | 0.15228 | 12.95 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
76,810 | 3.96221 | 0.13091 | 0.15692 | 12.67 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
76,831 | 3.96776 | 0.23837 | 0.12811 | 12.54 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
77,884 | 3.96412 | 0.15474 | 0.1524 | 12.55 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
77,895 | 3.96657 | 0.19652 | 0.15468 | 12.46 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
77,910 | 3.9665 | 0.19859 | 0.15538 | 12.87 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
78,159 | 3.96018 | 0.11226 | 0.14782 | 12.79 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
78,477 | 3.96021 | 0.11258 | 0.14029 | 13.44 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
78,815 | 3.96186 | 0.12697 | 0.14758 | 12.68 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
79,096 | 3.96623 | 0.19452 | 0.15329 | 14.21 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
82,041 | 3.96699 | 0.21549 | 0.16189 | 13.05 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
83,801 | 3.9671 | 0.21369 | 0.14999 | 13.54 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
83,804 | 3.96617 | 0.19238 | 0.15469 | 13.04 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
83,867 | 3.96646 | 0.2012 | 0.14945 | 13.37 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
83,916 | 3.96627 | 0.19481 | 0.15703 | 13.47 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
85,163 | 3.96414 | 0.1525 | 0.13794 | 13.12 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
86,435 | 3.96317 | 0.14108 | 0.14597 | 12.75 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
88,230 | 3.96594 | 0.188 | 0.15204 | 12.25 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
88,253 | 3.96609 | 0.19171 | 0.1521 | 12.75 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
90,502 | 3.96764 | 0.2363 | 0.15632 | 13.75 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
90,737 | 3.96266 | 0.13547 | 0.15308 | 13.41 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
91,273 | 3.9638 | 0.14787 | 0.15454 | 13.15 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
91,304 | 3.96606 | 0.19004 | 0.1523 | 12.54 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
92,272 | 3.96429 | 0.15786 | 0.14681 | 12.88 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
92,287 | 3.96217 | 0.12964 | 0.15215 | 13.18 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
94,266 | 3.95847 | 0.09972 | 0.1519 | 13.29 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
94,275 | 3.96639 | 0.19905 | 0.14793 | 13.15 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
96,609 | 3.9639 | 0.15207 | 0.14713 | 13.6 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
99,251 | 3.96443 | 0.16001 | 0.15318 | 13.57 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
99,862 | 3.96612 | 0.1906 | 0.15343 | 14.34 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
99,982 | 3.96754 | 0.23389 | 0.16748 | 13.89 | null | null | null | null | null | null | 1 | 153 Hilda | hilda_hungaria | 2015 |
End of preview. Expand in Data Studio
Nesvorny Asteroid Families (HCM V2.0)
Part of the Orbital Mechanics Datasets collection on Hugging Face.
170,981 asteroids grouped into 265 dynamical families from the Nesvorny HCM (Hierarchical Clustering Method) catalog. Asteroid families are groups of bodies sharing similar orbits, identified as fragments from catastrophic collisions in the asteroid belt.
Dataset description
This dataset combines the original 2015 family identifications (105 families, 143,711 members) with 153 newly discovered families from the 2024 update (27,270 members), based on proper orbital elements for 1.25 million main-belt asteroids. The hierarchical clustering method groups asteroids by proximity in proper element space (semimajor axis, eccentricity, inclination), revealing the collisional history of the solar system.
Families span the entire asteroid belt: inner belt (Flora, Vesta), middle belt (Eunomia, Koronis), outer belt (Themis, Eos, Hygiea), plus Hilda, Hungaria, Phocaea, and high-inclination populations.
Schema
| Column | Type | Description |
|---|---|---|
asteroid_number |
Int64 | MPC asteroid number (nullable for unnumbered objects) |
proper_a_au |
float64 | Proper semimajor axis (AU) |
proper_e |
float64 | Proper eccentricity |
sin_i |
float64 | Sine of proper inclination |
abs_mag |
float64 | Absolute magnitude H (mag) |
c_param |
float64 | Interloper identification parameter (2015 families only) |
freq_g_arcsec_yr |
float64 | Proper frequency of pericenter longitude (arcsec/yr, 2024 only) |
freq_s_arcsec_yr |
float64 | Proper frequency of nodal longitude (arcsec/yr, 2024 only) |
n_oppositions |
Int64 | Number of observed oppositions from MPC (2024 only) |
packed_name |
string | MPC packed designation (2024 only) |
unpacked_name |
string | MPC unpacked name/designation (2024 only) |
family_number |
Int64 | Family ID from Nesvorny catalog |
family_name |
string | Family name (named after largest member) |
region |
string | Belt region (inner, middle, outer, hilda_hungaria, highinclination, phocaea) |
source |
string | Catalog version: "2015" or "2024" |
Quick stats
- 170,981 asteroid-family memberships across 265 families
- 143,711 from 2015 catalog, 27,270 from 2024 catalog
- 153,795 with numbered asteroid IDs
- Proper semimajor axis range: 1.8399 -- 5.3347 AU
Usage
from datasets import load_dataset
ds = load_dataset("juliensimon/nesvorny-asteroid-families", split="train")
df = ds.to_pandas()
# Largest families
top = df.groupby("family_name").size().sort_values(ascending=False).head(10)
print(top)
# Plot families in proper element space
import matplotlib.pyplot as plt
fig, ax = plt.subplots(figsize=(12, 6))
for name, grp in df.groupby("family_name"):
if len(grp) > 1000:
ax.scatter(grp["proper_a_au"], grp["sin_i"], s=0.1, alpha=0.3, label=name)
ax.set_xlabel("Proper semimajor axis (AU)")
ax.set_ylabel("sin(i)")
ax.legend(markerscale=20, fontsize=8)
plt.title("Major Asteroid Families in Proper Element Space")
plt.show()
Data source
Nesvorny, D. (2024), Nesvorny HCM Asteroid Families V2.0, NASA Planetary Data System, urn:nasa:pds:ast.nesvorny.families::2.0. PDS SBN Archive
Based on: Nesvorny, D., Broz, M., Carruba, V. (2015), Identification and Dynamical Properties of Asteroid Families, in Asteroids IV, 297-321.
Pipeline
Source code: juliensimon/space-datasets
Citation
@dataset{nesvorny_asteroid_families,
author = {Simon, Julien},
title = {Nesvorny Asteroid Families (HCM V2.0)},
year = {2026},
publisher = {Hugging Face},
url = {https://huggingface.co/datasets/juliensimon/nesvorny-asteroid-families},
note = {Based on Nesvorny (2024) via NASA PDS Small Bodies Node}
}
License
- Downloads last month
- 30