| 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) |
| 2026-07-29 00:00 |
05:19:55.24 |
+27:58:34.9 |
HIP 24984 |
14.20 |
| 2026-07-29 12:00 |
05:20:25.86 |
+28:00:30.0 |
HIP 24984 |
8.00 |
| 2026-07-30 00:00 |
05:20:56.38 |
+28:02:24.8 |
HIP 24984 |
5.02 |
| 2026-07-30 12:00 |
05:21:26.80 |
+28:04:19.3 |
HIP 24984 |
9.17 |
| 2026-07-31 00:00 |
05:21:57.13 |
+28:06:13.7 |
HIP 25112 |
8.31 |
| 2026-07-31 12:00 |
05:22:27.35 |
+28:08:07.8 |
HIP 25112 |
2.60 |
| 2026-08-01 00:00 |
05:22:57.47 |
+28:10:01.7 |
HIP 25112 |
6.35 |
| 2026-08-01 12:00 |
05:23:27.49 |
+28:11:55.5 |
HIP 25112 |
12.99 |
| 2026-08-02 00:00 |
05:23:57.41 |
+28:13:49.0 |
HIP 25160 |
18.89 |
| 2026-08-02 12:00 |
05:24:27.22 |
+28:15:42.3 |
HIP 25160 |
22.60 |
| 2026-08-03 00:00 |
05:24:56.93 |
+28:17:35.4 |
HIP 25428 |
25.89 |
| 2026-08-03 12:00 |
05:25:26.53 |
+28:19:28.3 |
HIP 25428 |
20.36 |
| 2026-08-04 00:00 |
05:25:56.03 |
+28:21:21.0 |
HIP 25428 |
15.84 |
| 2026-08-04 12:00 |
05:26:25.41 |
+28:23:13.6 |
HIP 25428 |
13.36 |
| 2026-08-05 00:00 |
05:26:54.69 |
+28:25:06.0 |
HIP 25428 |
14.00 |
| 2026-08-05 12:00 |
05:27:23.86 |
+28:26:58.2 |
HIP 25428 |
17.40 |
| 2026-08-06 00:00 |
05:27:52.92 |
+28:28:50.2 |
HIP 25428 |
22.30 |
| 2026-08-06 12:00 |
05:28:21.86 |
+28:30:42.1 |
HIP 25755 |
24.80 |
| 2026-08-07 00:00 |
05:28:50.69 |
+28:32:33.8 |
HIP 25755 |
20.84 |
| 2026-08-07 12:00 |
05:29:19.41 |
+28:34:25.3 |
HIP 25755 |
18.47 |
| 2026-08-08 00:00 |
05:29:48.01 |
+28:36:16.8 |
HIP 25755 |
18.29 |
| 2026-08-08 12:00 |
05:30:16.49 |
+28:38:08.0 |
HIP 25755 |
20.34 |
| 2026-08-09 00:00 |
05:30:44.86 |
+28:39:59.2 |
HIP 25755 |
24.03 |
| 2026-08-09 12:00 |
05:31:13.11 |
+28:41:50.2 |
HIP 25755 |
28.72 |
| 2026-08-10 00:00 |
05:31:41.23 |
+28:43:41.0 |
HIP 25997 |
28.67 |
| 2026-08-10 12:00 |
05:32:09.24 |
+28:45:31.8 |
HIP 25948 |
26.22 |
| 2026-08-11 00:00 |
05:32:37.12 |
+28:47:22.4 |
HIP 25948 |
24.87 |
| 2026-08-11 12:00 |
05:33:04.88 |
+28:49:12.9 |
HIP 25948 |
25.09 |
| 2026-08-12 00:00 |
05:33:32.51 |
+28:51:03.3 |
HIP 25948 |
26.84 |
| 2026-08-12 12:00 |
05:34:00.02 |
+28:52:53.6 |
HIP 26227 |
28.89 |
| 2026-08-13 00:00 |
05:34:27.40 |
+28:54:43.8 |
HIP 26227 |
24.19 |
| 2026-08-13 12:00 |
05:34:54.65 |
+28:56:33.9 |
HIP 26227 |
20.35 |
| 2026-08-14 00:00 |
05:35:21.77 |
+28:58:24.0 |
HIP 26342 |
16.17 |
| 2026-08-14 12:00 |
05:35:48.77 |
+29:00:13.9 |
HIP 26342 |
10.07 |
| 2026-08-15 00:00 |
05:36:15.62 |
+29:02:03.8 |
HIP 26342 |
4.25 |
| 2026-08-15 12:00 |
05:36:42.35 |
+29:03:53.5 |
HIP 26342 |
3.21 |
| 2026-08-16 00:00 |
05:37:08.94 |
+29:05:43.3 |
HIP 26342 |
8.78 |
| 2026-08-16 12:00 |
05:37:35.40 |
+29:07:32.9 |
HIP 26342 |
14.74 |
| 2026-08-17 00:00 |
05:38:01.72 |
+29:09:22.5 |
HIP 26606 |
17.09 |
| 2026-08-17 12:00 |
05:38:27.90 |
+29:11:12.0 |
HIP 26606 |
11.13 |
| 2026-08-18 00:00 |
05:38:53.95 |
+29:13:01.5 |
HIP 26606 |
5.32 |
| 2026-08-18 12:00 |
05:39:19.85 |
+29:14:51.0 |
HIP 26606 |
1.96 |
| 2026-08-19 00:00 |
05:39:45.62 |
+29:16:40.4 |
HIP 26606 |
7.04 |