| Parameter |
Value |
| Designation |
C/1998 K3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1998-03-07T04:25:03.285120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:53Z |
| Obs used |
178 |
| NEO |
- |
| M1 |
10.000 |
| K1 |
10.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1998-06-05.0000000 |
| e |
0.99798200 |
| q (au) |
3.546314 |
| a (au) |
1757.339168 |
| i (deg) |
160.205607 |
| Ω (om, deg) |
307.947616 |
| ω (w, deg) |
47.827040 |
| M (ma, deg) |
0.001202 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.600 + 5.993\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.600 |
| n |
5.993 |
| gf |
0.875 |
| gb |
-0.500 |
| k |
0.953 |
| δ90 |
1.000 |
| 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) |
| 2026-06-01 00:00 |
07:28:43.49 |
+16:17:30.1 |
HIP 36406 |
13.17 |
| 2026-06-01 12:00 |
07:28:45.21 |
+16:17:27.9 |
HIP 36406 |
12.82 |
| 2026-06-02 00:00 |
07:28:46.95 |
+16:17:25.7 |
HIP 36406 |
12.46 |
| 2026-06-02 12:00 |
07:28:48.69 |
+16:17:23.5 |
HIP 36406 |
12.11 |
| 2026-06-03 00:00 |
07:28:50.45 |
+16:17:21.2 |
HIP 36406 |
11.76 |
| 2026-06-03 12:00 |
07:28:52.22 |
+16:17:18.8 |
HIP 36406 |
11.41 |
| 2026-06-04 00:00 |
07:28:54.01 |
+16:17:16.4 |
HIP 36406 |
11.06 |
| 2026-06-04 12:00 |
07:28:55.80 |
+16:17:13.9 |
HIP 36406 |
10.72 |
| 2026-06-05 00:00 |
07:28:57.61 |
+16:17:11.4 |
HIP 36406 |
10.38 |
| 2026-06-05 12:00 |
07:28:59.43 |
+16:17:08.9 |
HIP 36406 |
10.04 |
| 2026-06-06 00:00 |
07:29:01.26 |
+16:17:06.3 |
HIP 36406 |
9.71 |
| 2026-06-06 12:00 |
07:29:03.10 |
+16:17:03.6 |
HIP 36406 |
9.39 |
| 2026-06-07 00:00 |
07:29:04.96 |
+16:17:00.9 |
HIP 36406 |
9.08 |
| 2026-06-07 12:00 |
07:29:06.82 |
+16:16:58.1 |
HIP 36406 |
8.77 |
| 2026-06-08 00:00 |
07:29:08.70 |
+16:16:55.3 |
HIP 36406 |
8.48 |
| 2026-06-08 12:00 |
07:29:10.59 |
+16:16:52.4 |
HIP 36406 |
8.19 |
| 2026-06-09 00:00 |
07:29:12.48 |
+16:16:49.5 |
HIP 36406 |
7.93 |
| 2026-06-09 12:00 |
07:29:14.39 |
+16:16:46.6 |
HIP 36406 |
7.68 |
| 2026-06-10 00:00 |
07:29:16.31 |
+16:16:43.6 |
HIP 36406 |
7.44 |
| 2026-06-10 12:00 |
07:29:18.24 |
+16:16:40.5 |
HIP 36406 |
7.23 |
| 2026-06-11 00:00 |
07:29:20.18 |
+16:16:37.4 |
HIP 36406 |
7.04 |
| 2026-06-11 12:00 |
07:29:22.13 |
+16:16:34.2 |
HIP 36406 |
6.88 |
| 2026-06-12 00:00 |
07:29:24.09 |
+16:16:31.0 |
HIP 36406 |
6.74 |
| 2026-06-12 12:00 |
07:29:26.06 |
+16:16:27.8 |
HIP 36406 |
6.64 |
| 2026-06-13 00:00 |
07:29:28.04 |
+16:16:24.5 |
HIP 36406 |
6.56 |
| 2026-06-13 12:00 |
07:29:30.03 |
+16:16:21.1 |
HIP 36406 |
6.52 |
| 2026-06-14 00:00 |
07:29:32.03 |
+16:16:17.7 |
HIP 36406 |
6.52 |
| 2026-06-14 12:00 |
07:29:34.04 |
+16:16:14.3 |
HIP 36406 |
6.55 |
| 2026-06-15 00:00 |
07:29:36.06 |
+16:16:10.8 |
HIP 36406 |
6.61 |
| 2026-06-15 12:00 |
07:29:38.08 |
+16:16:07.3 |
HIP 36406 |
6.71 |
| 2026-06-16 00:00 |
07:29:40.12 |
+16:16:03.7 |
HIP 36406 |
6.85 |
| 2026-06-16 12:00 |
07:29:42.16 |
+16:16:00.0 |
HIP 36406 |
7.02 |
| 2026-06-17 00:00 |
07:29:44.22 |
+16:15:56.4 |
HIP 36406 |
7.21 |
| 2026-06-17 12:00 |
07:29:46.28 |
+16:15:52.6 |
HIP 36406 |
7.44 |
| 2026-06-18 00:00 |
07:29:48.34 |
+16:15:48.9 |
HIP 36406 |
7.69 |
| 2026-06-18 12:00 |
07:29:50.42 |
+16:15:45.0 |
HIP 36406 |
7.97 |
| 2026-06-19 00:00 |
07:29:52.51 |
+16:15:41.2 |
HIP 36406 |
8.27 |
| 2026-06-19 12:00 |
07:29:54.60 |
+16:15:37.3 |
HIP 36406 |
8.58 |
| 2026-06-20 00:00 |
07:29:56.70 |
+16:15:33.3 |
HIP 36406 |
8.92 |
| 2026-06-20 12:00 |
07:29:58.80 |
+16:15:29.3 |
HIP 36406 |
9.28 |
| 2026-06-21 00:00 |
07:30:00.92 |
+16:15:25.3 |
HIP 36406 |
9.64 |
| 2026-06-21 12:00 |
07:30:03.04 |
+16:15:21.2 |
HIP 36406 |
10.03 |
| 2026-06-22 00:00 |
07:30:05.17 |
+16:15:17.1 |
HIP 36406 |
10.42 |