| Parameter |
Value |
| Designation |
230P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-11-18T01:34:10.223040Z |
| Orbit solution date (soln_date, UTC) |
2025-11-13T12:12:40Z |
| Obs used |
1528 |
| NEO |
- |
| M1 |
15.600 |
| K1 |
5.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-07-24T08:25:25.536000Z |
| Discovery magnitude (MPC) |
21.80 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2015-07-08.0000000 |
| e |
0.56311389 |
| q (au) |
1.485293 |
| a (au) |
3.399726 |
| i (deg) |
14.653033 |
| Ω (om, deg) |
112.396470 |
| ω (w, deg) |
308.912952 |
| M (ma, deg) |
339.077991 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.860 + 2.038\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.860 |
| n |
2.038 |
| gf |
0.876 |
| gb |
-0.500 |
| k |
0.937 |
| δ90 |
3.149 |
| 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) |
| 2026-05-12 00:00 |
17:49:48.67 |
-14:59:08.4 |
HIP 87444 |
32.82 |
| 2026-05-12 12:00 |
17:49:34.64 |
-14:59:00.2 |
HIP 87074 |
32.40 |
| 2026-05-13 00:00 |
17:49:20.44 |
-14:58:52.4 |
HIP 87074 |
29.36 |
| 2026-05-13 12:00 |
17:49:06.04 |
-14:58:44.8 |
HIP 87074 |
26.39 |
| 2026-05-14 00:00 |
17:48:51.47 |
-14:58:37.6 |
HIP 87074 |
23.52 |
| 2026-05-14 12:00 |
17:48:36.72 |
-14:58:30.6 |
HIP 87074 |
20.82 |
| 2026-05-15 00:00 |
17:48:21.78 |
-14:58:24.0 |
HIP 87074 |
18.41 |
| 2026-05-15 12:00 |
17:48:06.67 |
-14:58:17.7 |
HIP 87074 |
16.42 |
| 2026-05-16 00:00 |
17:47:51.39 |
-14:58:11.8 |
HIP 87074 |
15.07 |
| 2026-05-16 12:00 |
17:47:35.93 |
-14:58:06.2 |
HIP 87074 |
14.56 |
| 2026-05-17 00:00 |
17:47:20.29 |
-14:58:00.9 |
HIP 87074 |
15.01 |
| 2026-05-17 12:00 |
17:47:04.49 |
-14:57:55.9 |
HIP 86988 |
14.54 |
| 2026-05-18 00:00 |
17:46:48.53 |
-14:57:51.3 |
HIP 86988 |
12.92 |
| 2026-05-18 12:00 |
17:46:32.39 |
-14:57:47.0 |
HIP 86988 |
12.34 |
| 2026-05-19 00:00 |
17:46:16.10 |
-14:57:43.1 |
HIP 86988 |
12.99 |
| 2026-05-19 12:00 |
17:45:59.64 |
-14:57:39.5 |
HIP 86988 |
14.73 |
| 2026-05-20 00:00 |
17:45:43.03 |
-14:57:36.2 |
HIP 86988 |
17.25 |
| 2026-05-20 12:00 |
17:45:26.25 |
-14:57:33.3 |
HIP 86988 |
20.30 |
| 2026-05-21 00:00 |
17:45:09.33 |
-14:57:30.8 |
HIP 86988 |
23.69 |
| 2026-05-21 12:00 |
17:44:52.25 |
-14:57:28.6 |
HIP 86988 |
27.30 |
| 2026-05-22 00:00 |
17:44:35.03 |
-14:57:26.7 |
HIP 86988 |
31.08 |
| 2026-05-22 12:00 |
17:44:17.65 |
-14:57:25.2 |
HIP 86988 |
34.98 |
| 2026-05-23 00:00 |
17:44:00.13 |
-14:57:24.1 |
HIP 86988 |
38.98 |
| 2026-05-23 12:00 |
17:43:42.47 |
-14:57:23.3 |
HIP 86683 |
39.16 |
| 2026-05-24 00:00 |
17:43:24.68 |
-14:57:22.9 |
HIP 86683 |
37.73 |
| 2026-05-24 12:00 |
17:43:06.74 |
-14:57:22.9 |
HIP 86683 |
36.73 |
| 2026-05-25 00:00 |
17:42:48.67 |
-14:57:23.2 |
HIP 86683 |
36.22 |
| 2026-05-25 12:00 |
17:42:30.46 |
-14:57:23.9 |
HIP 86683 |
36.23 |
| 2026-05-26 00:00 |
17:42:12.13 |
-14:57:24.9 |
HIP 86683 |
36.77 |
| 2026-05-26 12:00 |
17:41:53.67 |
-14:57:26.3 |
HIP 86683 |
37.82 |
| 2026-05-27 00:00 |
17:41:35.08 |
-14:57:28.1 |
HIP 86496 |
37.54 |
| 2026-05-27 12:00 |
17:41:16.37 |
-14:57:30.3 |
HIP 86496 |
35.93 |
| 2026-05-28 00:00 |
17:40:57.54 |
-14:57:32.8 |
HIP 86496 |
34.83 |
| 2026-05-28 12:00 |
17:40:38.59 |
-14:57:35.7 |
HIP 86496 |
34.28 |
| 2026-05-29 00:00 |
17:40:19.53 |
-14:57:38.9 |
HIP 86496 |
34.34 |
| 2026-05-29 12:00 |
17:40:00.36 |
-14:57:42.6 |
HIP 86496 |
35.01 |
| 2026-05-30 00:00 |
17:39:41.07 |
-14:57:46.6 |
HIP 86496 |
36.27 |
| 2026-05-30 12:00 |
17:39:21.68 |
-14:57:51.0 |
HIP 86263 |
36.59 |
| 2026-05-31 00:00 |
17:39:02.19 |
-14:57:55.8 |
HIP 86263 |
33.39 |
| 2026-05-31 12:00 |
17:38:42.59 |
-14:58:00.9 |
HIP 86263 |
30.57 |
| 2026-06-01 00:00 |
17:38:22.89 |
-14:58:06.5 |
HIP 86263 |
28.24 |
| 2026-06-01 12:00 |
17:38:03.10 |
-14:58:12.4 |
HIP 86263 |
26.56 |
| 2026-06-02 00:00 |
17:37:43.22 |
-14:58:18.7 |
HIP 86263 |
25.67 |