| Parameter |
Value |
| Designation |
507P/Lemmon |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-12-06T12:07:02.400960Z |
| Orbit solution date (soln_date, UTC) |
2025-08-01T17:26:05Z |
| Obs used |
99 |
| NEO |
- |
| M1 |
15.800 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2007-09-25T06:37:46.272000Z |
| Discovery magnitude (MPC) |
20.60 V |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2019-04-20.0000000 |
| e |
0.56799400 |
| q (au) |
2.717068 |
| a (au) |
6.289421 |
| i (deg) |
17.095414 |
| Ω (om, deg) |
233.426223 |
| ω (w, deg) |
108.747547 |
| M (ma, deg) |
277.110996 |
Magnitude
Scatter + Global Linear
$$
M_a = (18.505 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
18.505 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.756 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
07:18:34.80 |
+05:44:48.5 |
HIP 35458 |
37.44 |
| 2026-03-26 12:00 |
07:18:35.68 |
+05:45:44.8 |
HIP 35458 |
36.48 |
| 2026-03-27 00:00 |
07:18:36.71 |
+05:46:40.8 |
HIP 35458 |
35.51 |
| 2026-03-27 12:00 |
07:18:37.88 |
+05:47:36.5 |
HIP 35458 |
34.54 |
| 2026-03-28 00:00 |
07:18:39.18 |
+05:48:31.9 |
HIP 35458 |
33.56 |
| 2026-03-28 12:00 |
07:18:40.62 |
+05:49:27.0 |
HIP 35458 |
32.59 |
| 2026-03-29 00:00 |
07:18:42.20 |
+05:50:21.8 |
HIP 35458 |
31.61 |
| 2026-03-29 12:00 |
07:18:43.92 |
+05:51:16.2 |
HIP 35458 |
30.62 |
| 2026-03-30 00:00 |
07:18:45.78 |
+05:52:10.4 |
HIP 35458 |
29.64 |
| 2026-03-30 12:00 |
07:18:47.77 |
+05:53:04.2 |
HIP 35458 |
28.66 |
| 2026-03-31 00:00 |
07:18:49.89 |
+05:53:57.8 |
HIP 35458 |
27.67 |
| 2026-03-31 12:00 |
07:18:52.15 |
+05:54:50.9 |
HIP 35458 |
26.70 |
| 2026-04-01 00:00 |
07:18:54.55 |
+05:55:43.8 |
HIP 35458 |
25.72 |
| 2026-04-01 12:00 |
07:18:57.08 |
+05:56:36.3 |
HIP 35458 |
24.76 |
| 2026-04-02 00:00 |
07:18:59.74 |
+05:57:28.5 |
HIP 35458 |
23.80 |
| 2026-04-02 12:00 |
07:19:02.54 |
+05:58:20.3 |
HIP 35458 |
22.86 |
| 2026-04-03 00:00 |
07:19:05.47 |
+05:59:11.8 |
HIP 35458 |
21.94 |
| 2026-04-03 12:00 |
07:19:08.53 |
+06:00:02.9 |
HIP 35458 |
21.04 |
| 2026-04-04 00:00 |
07:19:11.73 |
+06:00:53.7 |
HIP 35458 |
20.18 |
| 2026-04-04 12:00 |
07:19:15.05 |
+06:01:44.1 |
HIP 35458 |
19.35 |
| 2026-04-05 00:00 |
07:19:18.51 |
+06:02:34.1 |
HIP 35458 |
18.57 |
| 2026-04-05 12:00 |
07:19:22.10 |
+06:03:23.8 |
HIP 35458 |
17.84 |
| 2026-04-06 00:00 |
07:19:25.82 |
+06:04:13.1 |
HIP 35458 |
17.18 |
| 2026-04-06 12:00 |
07:19:29.67 |
+06:05:02.0 |
HIP 35458 |
16.61 |
| 2026-04-07 00:00 |
07:19:33.65 |
+06:05:50.6 |
HIP 35458 |
16.13 |
| 2026-04-07 12:00 |
07:19:37.76 |
+06:06:38.8 |
HIP 35458 |
15.75 |
| 2026-04-08 00:00 |
07:19:41.99 |
+06:07:26.5 |
HIP 35458 |
15.50 |
| 2026-04-08 12:00 |
07:19:46.36 |
+06:08:13.9 |
HIP 35458 |
15.38 |
| 2026-04-09 00:00 |
07:19:50.85 |
+06:09:00.9 |
HIP 35458 |
15.40 |
| 2026-04-09 12:00 |
07:19:55.47 |
+06:09:47.5 |
HIP 35458 |
15.57 |
| 2026-04-10 00:00 |
07:20:00.22 |
+06:10:33.7 |
HIP 35614 |
14.74 |
| 2026-04-10 12:00 |
07:20:05.09 |
+06:11:19.5 |
HIP 35614 |
13.38 |
| 2026-04-11 00:00 |
07:20:10.09 |
+06:12:04.9 |
HIP 35614 |
12.02 |
| 2026-04-11 12:00 |
07:20:15.21 |
+06:12:49.9 |
HIP 35614 |
10.64 |
| 2026-04-12 00:00 |
07:20:20.46 |
+06:13:34.4 |
HIP 35614 |
9.26 |
| 2026-04-12 12:00 |
07:20:25.83 |
+06:14:18.6 |
HIP 35614 |
7.90 |
| 2026-04-13 00:00 |
07:20:31.33 |
+06:15:02.3 |
HIP 35614 |
6.58 |
| 2026-04-13 12:00 |
07:20:36.95 |
+06:15:45.6 |
HIP 35614 |
5.36 |
| 2026-04-14 00:00 |
07:20:42.69 |
+06:16:28.5 |
HIP 35614 |
4.33 |
| 2026-04-14 12:00 |
07:20:48.56 |
+06:17:10.9 |
HIP 35614 |
3.69 |
| 2026-04-15 00:00 |
07:20:54.54 |
+06:17:52.9 |
HIP 35614 |
3.71 |
| 2026-04-15 12:00 |
07:21:00.65 |
+06:18:34.4 |
HIP 35614 |
4.38 |
| 2026-04-16 00:00 |
07:21:06.88 |
+06:19:15.5 |
HIP 35614 |
5.50 |