| Parameter |
Value |
| Designation |
C/1999 K5 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-07-04T09:14:43.310400Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:00Z |
| Obs used |
239 |
| NEO |
- |
| M1 |
6.100 |
| K1 |
10.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2000-03-16.0000000 |
| e |
1.00176295 |
| q (au) |
3.255394 |
| a (au) |
-1846.560639 |
| i (deg) |
89.471269 |
| Ω (om, deg) |
106.379754 |
| ω (w, deg) |
241.485412 |
| M (ma, deg) |
-0.001371 |
Magnitude
Scatter + Global Linear
$$
M_a = (3.963 + 5.981\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
3.963 |
| n |
5.981 |
| gf |
1.000 |
| gb |
-0.529 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
07:37:55.08 |
+52:17:28.5 |
HIP 37090 |
7.67 |
| 2026-07-29 12:00 |
07:37:59.00 |
+52:17:29.9 |
HIP 37090 |
8.14 |
| 2026-07-30 00:00 |
07:38:02.91 |
+52:17:31.5 |
HIP 37090 |
8.63 |
| 2026-07-30 12:00 |
07:38:06.81 |
+52:17:33.2 |
HIP 37090 |
9.13 |
| 2026-07-31 00:00 |
07:38:10.70 |
+52:17:35.2 |
HIP 37090 |
9.65 |
| 2026-07-31 12:00 |
07:38:14.59 |
+52:17:37.2 |
HIP 37090 |
10.17 |
| 2026-08-01 00:00 |
07:38:18.46 |
+52:17:39.5 |
HIP 37090 |
10.70 |
| 2026-08-01 12:00 |
07:38:22.33 |
+52:17:41.8 |
HIP 37090 |
11.24 |
| 2026-08-02 00:00 |
07:38:26.19 |
+52:17:44.4 |
HIP 37090 |
11.78 |
| 2026-08-02 12:00 |
07:38:30.04 |
+52:17:47.1 |
HIP 37090 |
12.33 |
| 2026-08-03 00:00 |
07:38:33.88 |
+52:17:49.9 |
HIP 37090 |
12.88 |
| 2026-08-03 12:00 |
07:38:37.71 |
+52:17:53.0 |
HIP 37090 |
13.43 |
| 2026-08-04 00:00 |
07:38:41.53 |
+52:17:56.1 |
HIP 37090 |
13.99 |
| 2026-08-04 12:00 |
07:38:45.34 |
+52:17:59.5 |
HIP 37090 |
14.55 |
| 2026-08-05 00:00 |
07:38:49.14 |
+52:18:03.0 |
HIP 37090 |
15.11 |
| 2026-08-05 12:00 |
07:38:52.93 |
+52:18:06.6 |
HIP 37090 |
15.67 |
| 2026-08-06 00:00 |
07:38:56.71 |
+52:18:10.4 |
HIP 37273 |
16.06 |
| 2026-08-06 12:00 |
07:39:00.48 |
+52:18:14.4 |
HIP 37273 |
15.91 |
| 2026-08-07 00:00 |
07:39:04.23 |
+52:18:18.5 |
HIP 37273 |
15.77 |
| 2026-08-07 12:00 |
07:39:07.98 |
+52:18:22.8 |
HIP 37273 |
15.65 |
| 2026-08-08 00:00 |
07:39:11.71 |
+52:18:27.3 |
HIP 37273 |
15.55 |
| 2026-08-08 12:00 |
07:39:15.43 |
+52:18:31.9 |
HIP 37273 |
15.46 |
| 2026-08-09 00:00 |
07:39:19.14 |
+52:18:36.7 |
HIP 37273 |
15.39 |
| 2026-08-09 12:00 |
07:39:22.84 |
+52:18:41.6 |
HIP 37273 |
15.35 |
| 2026-08-10 00:00 |
07:39:26.52 |
+52:18:46.7 |
HIP 37273 |
15.32 |
| 2026-08-10 12:00 |
07:39:30.19 |
+52:18:51.9 |
HIP 37273 |
15.30 |
| 2026-08-11 00:00 |
07:39:33.84 |
+52:18:57.4 |
HIP 37273 |
15.31 |
| 2026-08-11 12:00 |
07:39:37.49 |
+52:19:02.9 |
HIP 37273 |
15.33 |
| 2026-08-12 00:00 |
07:39:41.11 |
+52:19:08.7 |
HIP 37273 |
15.37 |
| 2026-08-12 12:00 |
07:39:44.73 |
+52:19:14.6 |
HIP 37273 |
15.43 |
| 2026-08-13 00:00 |
07:39:48.33 |
+52:19:20.6 |
HIP 37273 |
15.51 |
| 2026-08-13 12:00 |
07:39:51.91 |
+52:19:26.8 |
HIP 37273 |
15.60 |
| 2026-08-14 00:00 |
07:39:55.48 |
+52:19:33.2 |
HIP 37273 |
15.70 |
| 2026-08-14 12:00 |
07:39:59.04 |
+52:19:39.7 |
HIP 37273 |
15.83 |
| 2026-08-15 00:00 |
07:40:02.58 |
+52:19:46.4 |
HIP 37273 |
15.96 |
| 2026-08-15 12:00 |
07:40:06.10 |
+52:19:53.3 |
HIP 37273 |
16.11 |
| 2026-08-16 00:00 |
07:40:09.61 |
+52:20:00.3 |
HIP 37273 |
16.28 |
| 2026-08-16 12:00 |
07:40:13.10 |
+52:20:07.4 |
HIP 37273 |
16.46 |
| 2026-08-17 00:00 |
07:40:16.57 |
+52:20:14.8 |
HIP 37273 |
16.65 |
| 2026-08-17 12:00 |
07:40:20.03 |
+52:20:22.3 |
HIP 37273 |
16.85 |
| 2026-08-18 00:00 |
07:40:23.47 |
+52:20:29.9 |
HIP 37273 |
17.06 |
| 2026-08-18 12:00 |
07:40:26.89 |
+52:20:37.7 |
HIP 37273 |
17.28 |
| 2026-08-19 00:00 |
07:40:30.30 |
+52:20:45.7 |
HIP 37273 |
17.52 |