| Parameter |
Value |
| Designation |
513P/Broughton |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-06-16T07:21:38.180160Z |
| Orbit solution date (soln_date, UTC) |
2026-03-12T02:53:17Z |
| Obs used |
287 |
| NEO |
- |
| M1 |
7.500 |
| K1 |
19.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2025-09-24T09:49:32.505600Z |
| Discovery magnitude (MPC) |
19.56 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2019-03-25.0000000 |
| e |
0.55079452 |
| q (au) |
3.276271 |
| a (au) |
7.293480 |
| i (deg) |
21.336906 |
| Ω (om, deg) |
57.023900 |
| ω (w, deg) |
304.483984 |
| M (ma, deg) |
246.147688 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.105 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.105 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.738 |
| k |
0.800 |
| δ90 |
10.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
04:13:11.99 |
+23:33:34.8 |
HIP 19662 |
6.24 |
| 2026-06-01 12:00 |
04:13:48.67 |
+23:36:19.6 |
HIP 19793 |
10.15 |
| 2026-06-02 00:00 |
04:14:25.34 |
+23:39:03.8 |
HIP 19785 |
2.74 |
| 2026-06-02 12:00 |
04:15:02.00 |
+23:41:47.5 |
HIP 19785 |
8.14 |
| 2026-06-03 00:00 |
04:15:38.64 |
+23:44:30.7 |
HIP 19785 |
16.75 |
| 2026-06-03 12:00 |
04:16:15.27 |
+23:47:13.3 |
HIP 19853 |
21.03 |
| 2026-06-04 00:00 |
04:16:51.89 |
+23:49:55.3 |
HIP 20012 |
23.26 |
| 2026-06-04 12:00 |
04:17:28.49 |
+23:52:36.9 |
HIP 20139 |
23.66 |
| 2026-06-05 00:00 |
04:18:05.07 |
+23:55:17.8 |
HIP 20139 |
14.93 |
| 2026-06-05 12:00 |
04:18:41.64 |
+23:57:58.3 |
HIP 20139 |
6.34 |
| 2026-06-06 00:00 |
04:19:18.19 |
+24:00:38.2 |
HIP 20139 |
3.37 |
| 2026-06-06 12:00 |
04:19:54.73 |
+24:03:17.5 |
HIP 20139 |
11.66 |
| 2026-06-07 00:00 |
04:20:31.24 |
+24:05:56.3 |
HIP 20139 |
20.33 |
| 2026-06-07 12:00 |
04:21:07.74 |
+24:08:34.6 |
HIP 20209 |
28.91 |
| 2026-06-08 00:00 |
04:21:44.22 |
+24:11:12.4 |
HIP 20491 |
27.51 |
| 2026-06-08 12:00 |
04:22:20.68 |
+24:13:49.6 |
HIP 20491 |
19.03 |
| 2026-06-09 00:00 |
04:22:57.12 |
+24:16:26.3 |
HIP 20491 |
10.93 |
| 2026-06-09 12:00 |
04:23:33.54 |
+24:19:02.4 |
HIP 20491 |
5.34 |
| 2026-06-10 00:00 |
04:24:09.94 |
+24:21:38.0 |
HIP 20533 |
4.26 |
| 2026-06-10 12:00 |
04:24:46.32 |
+24:24:13.1 |
HIP 20533 |
12.26 |
| 2026-06-11 00:00 |
04:25:22.67 |
+24:26:47.7 |
HIP 20533 |
20.80 |
| 2026-06-11 12:00 |
04:25:59.00 |
+24:29:21.7 |
HIP 20834 |
26.01 |
| 2026-06-12 00:00 |
04:26:35.30 |
+24:31:55.2 |
HIP 20834 |
18.37 |
| 2026-06-12 12:00 |
04:27:11.58 |
+24:34:28.2 |
HIP 20834 |
12.18 |
| 2026-06-13 00:00 |
04:27:47.84 |
+24:37:00.6 |
HIP 20834 |
10.40 |
| 2026-06-13 12:00 |
04:28:24.07 |
+24:39:32.5 |
HIP 20834 |
14.72 |
| 2026-06-14 00:00 |
04:29:00.27 |
+24:42:03.9 |
HIP 20834 |
21.75 |
| 2026-06-14 12:00 |
04:29:36.44 |
+24:44:34.8 |
HIP 21103 |
28.51 |
| 2026-06-15 00:00 |
04:30:12.58 |
+24:47:05.2 |
HIP 21103 |
20.68 |
| 2026-06-15 12:00 |
04:30:48.69 |
+24:49:35.0 |
HIP 21103 |
13.78 |
| 2026-06-16 00:00 |
04:31:24.77 |
+24:52:04.4 |
HIP 21103 |
9.94 |
| 2026-06-16 12:00 |
04:32:00.82 |
+24:54:33.2 |
HIP 21103 |
12.41 |
| 2026-06-17 00:00 |
04:32:36.84 |
+24:57:01.5 |
HIP 21174 |
14.51 |
| 2026-06-17 12:00 |
04:33:12.83 |
+24:59:29.3 |
HIP 21174 |
16.40 |
| 2026-06-18 00:00 |
04:33:48.78 |
+25:01:56.6 |
HIP 21174 |
21.73 |
| 2026-06-18 12:00 |
04:34:24.69 |
+25:04:23.3 |
HIP 21174 |
28.62 |
| 2026-06-19 00:00 |
04:35:00.57 |
+25:06:49.6 |
HIP 21174 |
36.19 |
| 2026-06-19 12:00 |
04:35:36.42 |
+25:09:15.4 |
HIP 21532 |
42.18 |
| 2026-06-20 00:00 |
04:36:12.22 |
+25:11:40.6 |
HIP 21532 |
35.90 |
| 2026-06-20 12:00 |
04:36:47.99 |
+25:14:05.4 |
HIP 21532 |
30.69 |
| 2026-06-21 00:00 |
04:37:23.72 |
+25:16:29.7 |
HIP 21532 |
27.15 |
| 2026-06-21 12:00 |
04:37:59.42 |
+25:18:53.5 |
HIP 21689 |
19.79 |
| 2026-06-22 00:00 |
04:38:35.07 |
+25:21:16.7 |
HIP 21689 |
13.60 |