C/1998 K3 (LINEAR)
| 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
$$
M_a = (7.620 + 5.981\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.620 |
| n |
5.981 |
| gf |
0.876 |
| 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) |
| 2026-02-03 00:00 |
07:30:34.72 |
+16:04:14.9 |
HIP 36406 |
16.94 |
| 2026-02-03 12:00 |
07:30:32.17 |
+16:04:21.4 |
HIP 36406 |
16.33 |
| 2026-02-04 00:00 |
07:30:29.63 |
+16:04:27.8 |
HIP 36406 |
15.72 |
| 2026-02-04 12:00 |
07:30:27.10 |
+16:04:34.3 |
HIP 36406 |
15.11 |
| 2026-02-05 00:00 |
07:30:24.59 |
+16:04:40.8 |
HIP 36406 |
14.51 |
| 2026-02-05 12:00 |
07:30:22.08 |
+16:04:47.3 |
HIP 36406 |
13.91 |
| 2026-02-06 00:00 |
07:30:19.58 |
+16:04:53.7 |
HIP 36406 |
13.31 |
| 2026-02-06 12:00 |
07:30:17.09 |
+16:05:00.2 |
HIP 36406 |
12.71 |
| 2026-02-07 00:00 |
07:30:14.62 |
+16:05:06.7 |
HIP 36406 |
12.12 |
| 2026-02-07 12:00 |
07:30:12.15 |
+16:05:13.2 |
HIP 36406 |
11.54 |
| 2026-02-08 00:00 |
07:30:09.69 |
+16:05:19.7 |
HIP 36406 |
10.95 |
| 2026-02-08 12:00 |
07:30:07.25 |
+16:05:26.2 |
HIP 36406 |
10.38 |
| 2026-02-09 00:00 |
07:30:04.82 |
+16:05:32.7 |
HIP 36406 |
9.80 |
| 2026-02-09 12:00 |
07:30:02.40 |
+16:05:39.2 |
HIP 36406 |
9.23 |
| 2026-02-10 00:00 |
07:29:59.99 |
+16:05:45.8 |
HIP 36406 |
8.67 |
| 2026-02-10 12:00 |
07:29:57.59 |
+16:05:52.3 |
HIP 36406 |
8.11 |
| 2026-02-11 00:00 |
07:29:55.20 |
+16:05:58.8 |
HIP 36406 |
7.56 |
| 2026-02-11 12:00 |
07:29:52.83 |
+16:06:05.3 |
HIP 36406 |
7.02 |
| 2026-02-12 00:00 |
07:29:50.47 |
+16:06:11.8 |
HIP 36406 |
6.49 |
| 2026-02-12 12:00 |
07:29:48.12 |
+16:06:18.3 |
HIP 36406 |
5.96 |
| 2026-02-13 00:00 |
07:29:45.78 |
+16:06:24.8 |
HIP 36406 |
5.45 |
| 2026-02-13 12:00 |
07:29:43.46 |
+16:06:31.3 |
HIP 36406 |
4.96 |
| 2026-02-14 00:00 |
07:29:41.15 |
+16:06:37.8 |
HIP 36406 |
4.48 |
| 2026-02-14 12:00 |
07:29:38.85 |
+16:06:44.3 |
HIP 36406 |
4.03 |
| 2026-02-15 00:00 |
07:29:36.57 |
+16:06:50.8 |
HIP 36406 |
3.62 |
| 2026-02-15 12:00 |
07:29:34.30 |
+16:06:57.3 |
HIP 36406 |
3.25 |
| 2026-02-16 00:00 |
07:29:32.05 |
+16:07:03.8 |
HIP 36406 |
2.94 |
| 2026-02-16 12:00 |
07:29:29.80 |
+16:07:10.2 |
HIP 36406 |
2.70 |
| 2026-02-17 00:00 |
07:29:27.58 |
+16:07:16.7 |
HIP 36406 |
2.57 |
| 2026-02-17 12:00 |
07:29:25.36 |
+16:07:23.2 |
HIP 36406 |
2.55 |
| 2026-02-18 00:00 |
07:29:23.16 |
+16:07:29.6 |
HIP 36406 |
2.64 |
| 2026-02-18 12:00 |
07:29:20.98 |
+16:07:36.1 |
HIP 36406 |
2.83 |
| 2026-02-19 00:00 |
07:29:18.81 |
+16:07:42.5 |
HIP 36406 |
3.10 |
| 2026-02-19 12:00 |
07:29:16.66 |
+16:07:48.9 |
HIP 36406 |
3.42 |
| 2026-02-20 00:00 |
07:29:14.52 |
+16:07:55.4 |
HIP 36406 |
3.79 |
| 2026-02-20 12:00 |
07:29:12.40 |
+16:08:01.8 |
HIP 36406 |
4.19 |
| 2026-02-21 00:00 |
07:29:10.29 |
+16:08:08.2 |
HIP 36406 |
4.62 |
| 2026-02-21 12:00 |
07:29:08.19 |
+16:08:14.5 |
HIP 36406 |
5.05 |
| 2026-02-22 00:00 |
07:29:06.12 |
+16:08:20.9 |
HIP 36406 |
5.50 |
| 2026-02-22 12:00 |
07:29:04.06 |
+16:08:27.3 |
HIP 36406 |
5.95 |
| 2026-02-23 00:00 |
07:29:02.01 |
+16:08:33.6 |
HIP 36406 |
6.40 |
| 2026-02-23 12:00 |
07:28:59.98 |
+16:08:40.0 |
HIP 36406 |
6.86 |
| 2026-02-24 00:00 |
07:28:57.97 |
+16:08:46.3 |
HIP 36406 |
7.32 |