435P/PANSTARRS
| Parameter |
Value |
| Designation |
435P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-04-30T15:49:53.086080Z |
| Orbit solution date (soln_date, UTC) |
2021-11-20T19:13:24Z |
| Obs used |
88 |
| NEO |
- |
| M1 |
18.800 |
| K1 |
4.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2015-05-18T13:04:20.524800Z |
| Discovery magnitude (MPC) |
22.76 G |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2018-10-13.0000000 |
| e |
0.31859695 |
| q (au) |
2.056387 |
| a (au) |
3.017872 |
| i (deg) |
18.889136 |
| Ω (om, deg) |
98.561523 |
| ω (w, deg) |
244.367853 |
| M (ma, deg) |
168.322066 |
Magnitude
Scatter + Global Linear
$$
M_a = (16.819 + 3.210\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
16.819 |
| n |
3.210 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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) |
| 2026-02-03 00:00 |
18:13:23.82 |
-18:12:34.9 |
HIP 89384 |
15.06 |
| 2026-02-03 12:00 |
18:14:16.44 |
-18:13:37.2 |
HIP 89384 |
5.04 |
| 2026-02-04 00:00 |
18:15:09.04 |
-18:14:38.5 |
HIP 89384 |
11.76 |
| 2026-02-04 12:00 |
18:16:01.64 |
-18:15:38.9 |
HIP 89529 |
21.43 |
| 2026-02-05 00:00 |
18:16:54.23 |
-18:16:38.5 |
HIP 89630 |
13.82 |
| 2026-02-05 12:00 |
18:17:46.82 |
-18:17:37.1 |
HIP 89630 |
11.07 |
| 2026-02-06 00:00 |
18:18:39.39 |
-18:18:34.9 |
HIP 89736 |
8.44 |
| 2026-02-06 12:00 |
18:19:31.96 |
-18:19:31.8 |
HIP 89736 |
14.11 |
| 2026-02-07 00:00 |
18:20:24.51 |
-18:20:27.8 |
HIP 89736 |
25.30 |
| 2026-02-07 12:00 |
18:21:17.06 |
-18:21:22.9 |
HIP 90055 |
28.12 |
| 2026-02-08 00:00 |
18:22:09.59 |
-18:22:17.1 |
HIP 90110 |
20.52 |
| 2026-02-08 12:00 |
18:23:02.11 |
-18:23:10.5 |
HIP 90110 |
12.01 |
| 2026-02-09 00:00 |
18:23:54.61 |
-18:24:03.1 |
HIP 90110 |
13.40 |
| 2026-02-09 12:00 |
18:24:47.11 |
-18:24:54.7 |
HIP 90257 |
8.00 |
| 2026-02-10 00:00 |
18:25:39.58 |
-18:25:45.6 |
HIP 90257 |
11.48 |
| 2026-02-10 12:00 |
18:26:32.04 |
-18:26:35.5 |
HIP 90373 |
21.46 |
| 2026-02-11 00:00 |
18:27:24.49 |
-18:27:24.7 |
HIP 90577 |
22.71 |
| 2026-02-11 12:00 |
18:28:16.92 |
-18:28:13.0 |
HIP 90577 |
10.61 |
| 2026-02-12 00:00 |
18:29:09.33 |
-18:29:00.5 |
HIP 90577 |
4.44 |
| 2026-02-12 12:00 |
18:30:01.72 |
-18:29:47.2 |
HIP 90619 |
13.29 |
| 2026-02-13 00:00 |
18:30:54.09 |
-18:30:33.0 |
HIP 90806 |
9.96 |
| 2026-02-13 12:00 |
18:31:46.44 |
-18:31:18.1 |
HIP 90806 |
8.59 |
| 2026-02-14 00:00 |
18:32:38.77 |
-18:32:02.4 |
HIP 90950 |
12.41 |
| 2026-02-14 12:00 |
18:33:31.07 |
-18:32:45.8 |
HIP 90950 |
11.76 |
| 2026-02-15 00:00 |
18:34:23.35 |
-18:33:28.5 |
HIP 91143 |
17.40 |
| 2026-02-15 12:00 |
18:35:15.61 |
-18:34:10.4 |
HIP 91143 |
5.14 |
| 2026-02-16 00:00 |
18:36:07.85 |
-18:34:51.6 |
HIP 91143 |
7.59 |
| 2026-02-16 12:00 |
18:37:00.05 |
-18:35:31.9 |
HIP 91143 |
19.90 |
| 2026-02-17 00:00 |
18:37:52.23 |
-18:36:11.6 |
HIP 91486 |
23.34 |
| 2026-02-17 12:00 |
18:38:44.39 |
-18:36:50.4 |
HIP 91486 |
11.17 |
| 2026-02-18 00:00 |
18:39:36.51 |
-18:37:28.6 |
HIP 91486 |
3.36 |
| 2026-02-18 12:00 |
18:40:28.61 |
-18:38:06.0 |
HIP 91486 |
14.26 |
| 2026-02-19 00:00 |
18:41:20.67 |
-18:38:42.7 |
HIP 91486 |
26.46 |
| 2026-02-19 12:00 |
18:42:12.70 |
-18:39:18.7 |
HIP 91698 |
27.22 |
| 2026-02-20 00:00 |
18:43:04.71 |
-18:39:53.9 |
HIP 91806 |
30.34 |
| 2026-02-20 12:00 |
18:43:56.67 |
-18:40:28.5 |
HIP 91806 |
32.85 |
| 2026-02-21 00:00 |
18:44:48.61 |
-18:41:02.4 |
HIP 92066 |
24.56 |
| 2026-02-21 12:00 |
18:45:40.51 |
-18:41:35.6 |
HIP 92066 |
19.98 |
| 2026-02-22 00:00 |
18:46:32.38 |
-18:42:08.2 |
HIP 92066 |
22.31 |
| 2026-02-22 12:00 |
18:47:24.21 |
-18:42:40.1 |
HIP 92301 |
20.33 |
| 2026-02-23 00:00 |
18:48:16.00 |
-18:43:11.3 |
HIP 92307 |
9.40 |
| 2026-02-23 12:00 |
18:49:07.76 |
-18:43:41.9 |
HIP 92307 |
7.29 |
| 2026-02-24 00:00 |
18:49:59.48 |
-18:44:11.8 |
HIP 92307 |
17.85 |