| Parameter |
Value |
| Designation |
C/2016 N6 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2018-07-18T04:53:54.179520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:26Z |
| Obs used |
3071 |
| NEO |
- |
| M1 |
6.800 |
| K1 |
10.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2018-02-01.0000000 |
| e |
0.99865186 |
| q (au) |
2.669116 |
| a (au) |
1979.851996 |
| i (deg) |
105.830421 |
| Ω (om, deg) |
298.977675 |
| ω (w, deg) |
162.803199 |
| M (ma, deg) |
359.998129 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.902 + 3.333\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.902 |
| n |
3.333 |
| gf |
1.000 |
| gb |
-0.687 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2016-06-27 |
2016-10-28 |
+38.9146 |
-31.451 |
| 2016-10-28 |
2018-06-20 |
+1.1594 |
-0.936 |
| 2018-08-28 |
2019-01-14 |
+13.3133 |
-6.770 |
| 2019-01-14 |
2020-12-12 |
-0.7531 |
+0.155 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
00:39:22.73 |
-61:37:16.3 |
HIP 3303 |
24.90 |
| 2026-06-01 12:00 |
00:39:27.00 |
-61:38:17.5 |
HIP 3303 |
25.16 |
| 2026-06-02 00:00 |
00:39:31.18 |
-61:39:19.2 |
HIP 3303 |
25.47 |
| 2026-06-02 12:00 |
00:39:35.29 |
-61:40:21.2 |
HIP 3303 |
25.84 |
| 2026-06-03 00:00 |
00:39:39.32 |
-61:41:23.8 |
HIP 3303 |
26.27 |
| 2026-06-03 12:00 |
00:39:43.27 |
-61:42:26.8 |
HIP 3303 |
26.75 |
| 2026-06-04 00:00 |
00:39:47.14 |
-61:43:30.2 |
HIP 3303 |
27.28 |
| 2026-06-04 12:00 |
00:39:50.93 |
-61:44:34.0 |
HIP 3303 |
27.86 |
| 2026-06-05 00:00 |
00:39:54.64 |
-61:45:38.3 |
HIP 3303 |
28.49 |
| 2026-06-05 12:00 |
00:39:58.26 |
-61:46:43.0 |
HIP 3303 |
29.17 |
| 2026-06-06 00:00 |
00:40:01.81 |
-61:47:48.1 |
HIP 3303 |
29.88 |
| 2026-06-06 12:00 |
00:40:05.27 |
-61:48:53.6 |
HIP 3303 |
30.64 |
| 2026-06-07 00:00 |
00:40:08.65 |
-61:49:59.6 |
HIP 3303 |
31.42 |
| 2026-06-07 12:00 |
00:40:11.94 |
-61:51:05.9 |
HIP 3303 |
32.25 |
| 2026-06-08 00:00 |
00:40:15.16 |
-61:52:12.7 |
HIP 3303 |
33.10 |
| 2026-06-08 12:00 |
00:40:18.28 |
-61:53:19.8 |
HIP 3303 |
33.99 |
| 2026-06-09 00:00 |
00:40:21.33 |
-61:54:27.4 |
HIP 3303 |
34.90 |
| 2026-06-09 12:00 |
00:40:24.28 |
-61:55:35.3 |
HIP 3303 |
35.83 |
| 2026-06-10 00:00 |
00:40:27.15 |
-61:56:43.7 |
HIP 3007 |
35.69 |
| 2026-06-10 12:00 |
00:40:29.94 |
-61:57:52.4 |
HIP 3007 |
34.80 |
| 2026-06-11 00:00 |
00:40:32.63 |
-61:59:01.5 |
HIP 3007 |
33.92 |
| 2026-06-11 12:00 |
00:40:35.24 |
-62:00:10.9 |
HIP 3007 |
33.06 |
| 2026-06-12 00:00 |
00:40:37.76 |
-62:01:20.8 |
HIP 3007 |
32.20 |
| 2026-06-12 12:00 |
00:40:40.20 |
-62:02:31.0 |
HIP 3007 |
31.35 |
| 2026-06-13 00:00 |
00:40:42.54 |
-62:03:41.5 |
HIP 3007 |
30.52 |
| 2026-06-13 12:00 |
00:40:44.79 |
-62:04:52.4 |
HIP 3007 |
29.70 |
| 2026-06-14 00:00 |
00:40:46.96 |
-62:06:03.7 |
HIP 3007 |
28.90 |
| 2026-06-14 12:00 |
00:40:49.03 |
-62:07:15.3 |
HIP 3007 |
28.11 |
| 2026-06-15 00:00 |
00:40:51.01 |
-62:08:27.2 |
HIP 3007 |
27.35 |
| 2026-06-15 12:00 |
00:40:52.90 |
-62:09:39.5 |
HIP 3007 |
26.61 |
| 2026-06-16 00:00 |
00:40:54.70 |
-62:10:52.1 |
HIP 3007 |
25.89 |
| 2026-06-16 12:00 |
00:40:56.40 |
-62:12:05.0 |
HIP 3007 |
25.20 |
| 2026-06-17 00:00 |
00:40:58.01 |
-62:13:18.3 |
HIP 3007 |
24.54 |
| 2026-06-17 12:00 |
00:40:59.53 |
-62:14:31.8 |
HIP 3007 |
23.92 |
| 2026-06-18 00:00 |
00:41:00.95 |
-62:15:45.6 |
HIP 3007 |
23.33 |
| 2026-06-18 12:00 |
00:41:02.28 |
-62:16:59.8 |
HIP 3007 |
22.78 |
| 2026-06-19 00:00 |
00:41:03.52 |
-62:18:14.2 |
HIP 3007 |
22.28 |
| 2026-06-19 12:00 |
00:41:04.66 |
-62:19:28.9 |
HIP 3007 |
21.82 |
| 2026-06-20 00:00 |
00:41:05.71 |
-62:20:43.9 |
HIP 3007 |
21.42 |
| 2026-06-20 12:00 |
00:41:06.66 |
-62:21:59.2 |
HIP 3007 |
21.07 |
| 2026-06-21 00:00 |
00:41:07.51 |
-62:23:14.8 |
HIP 3007 |
20.78 |
| 2026-06-21 12:00 |
00:41:08.27 |
-62:24:30.6 |
HIP 3007 |
20.55 |
| 2026-06-22 00:00 |
00:41:08.93 |
-62:25:46.6 |
HIP 3007 |
20.39 |