| Parameter |
Value |
| Designation |
68P/Klemola |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-11-11T19:47:30.373440Z |
| Orbit solution date (soln_date, UTC) |
2023-04-25T08:40:31Z |
| Obs used |
1680 |
| NEO |
- |
| M1 |
11.200 |
| K1 |
11.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2016-03-06.0000000 |
| e |
0.64034454 |
| q (au) |
1.762060 |
| a (au) |
4.899300 |
| i (deg) |
11.184340 |
| Ω (om, deg) |
175.299711 |
| ω (w, deg) |
153.835783 |
| M (ma, deg) |
237.681694 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.051 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.051 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.585 |
| 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) |
| 2026-05-12 00:00 |
10:06:29.32 |
+08:00:44.3 |
HIP 49496 |
4.87 |
| 2026-05-12 12:00 |
10:06:30.21 |
+08:01:02.9 |
HIP 49496 |
5.25 |
| 2026-05-13 00:00 |
10:06:31.22 |
+08:01:20.8 |
HIP 49496 |
5.64 |
| 2026-05-13 12:00 |
10:06:32.36 |
+08:01:38.1 |
HIP 49496 |
6.03 |
| 2026-05-14 00:00 |
10:06:33.61 |
+08:01:54.7 |
HIP 49496 |
6.43 |
| 2026-05-14 12:00 |
10:06:34.98 |
+08:02:10.5 |
HIP 49496 |
6.85 |
| 2026-05-15 00:00 |
10:06:36.46 |
+08:02:25.7 |
HIP 49496 |
7.27 |
| 2026-05-15 12:00 |
10:06:38.07 |
+08:02:40.2 |
HIP 49496 |
7.71 |
| 2026-05-16 00:00 |
10:06:39.79 |
+08:02:54.0 |
HIP 49496 |
8.16 |
| 2026-05-16 12:00 |
10:06:41.64 |
+08:03:07.1 |
HIP 49496 |
8.62 |
| 2026-05-17 00:00 |
10:06:43.60 |
+08:03:19.5 |
HIP 49496 |
9.10 |
| 2026-05-17 12:00 |
10:06:45.67 |
+08:03:31.3 |
HIP 49496 |
9.60 |
| 2026-05-18 00:00 |
10:06:47.87 |
+08:03:42.3 |
HIP 49496 |
10.11 |
| 2026-05-18 12:00 |
10:06:50.18 |
+08:03:52.6 |
HIP 49496 |
10.65 |
| 2026-05-19 00:00 |
10:06:52.61 |
+08:04:02.3 |
HIP 49496 |
11.20 |
| 2026-05-19 12:00 |
10:06:55.15 |
+08:04:11.3 |
HIP 49496 |
11.78 |
| 2026-05-20 00:00 |
10:06:57.81 |
+08:04:19.6 |
HIP 49496 |
12.38 |
| 2026-05-20 12:00 |
10:07:00.58 |
+08:04:27.2 |
HIP 49496 |
13.00 |
| 2026-05-21 00:00 |
10:07:03.47 |
+08:04:34.1 |
HIP 49496 |
13.64 |
| 2026-05-21 12:00 |
10:07:06.47 |
+08:04:40.4 |
HIP 49496 |
14.31 |
| 2026-05-22 00:00 |
10:07:09.59 |
+08:04:45.9 |
HIP 49496 |
15.01 |
| 2026-05-22 12:00 |
10:07:12.82 |
+08:04:50.8 |
HIP 49496 |
15.73 |
| 2026-05-23 00:00 |
10:07:16.16 |
+08:04:55.0 |
HIP 49660 |
15.24 |
| 2026-05-23 12:00 |
10:07:19.62 |
+08:04:58.6 |
HIP 49660 |
14.41 |
| 2026-05-24 00:00 |
10:07:23.19 |
+08:05:01.4 |
HIP 49660 |
13.56 |
| 2026-05-24 12:00 |
10:07:26.86 |
+08:05:03.6 |
HIP 49660 |
12.68 |
| 2026-05-25 00:00 |
10:07:30.65 |
+08:05:05.1 |
HIP 49660 |
11.78 |
| 2026-05-25 12:00 |
10:07:34.55 |
+08:05:06.0 |
HIP 49660 |
10.86 |
| 2026-05-26 00:00 |
10:07:38.56 |
+08:05:06.2 |
HIP 49660 |
9.92 |
| 2026-05-26 12:00 |
10:07:42.68 |
+08:05:05.7 |
HIP 49660 |
8.95 |
| 2026-05-27 00:00 |
10:07:46.91 |
+08:05:04.6 |
HIP 49660 |
7.97 |
| 2026-05-27 12:00 |
10:07:51.25 |
+08:05:02.8 |
HIP 49660 |
6.99 |
| 2026-05-28 00:00 |
10:07:55.70 |
+08:05:00.3 |
HIP 49660 |
6.00 |
| 2026-05-28 12:00 |
10:08:00.25 |
+08:04:57.2 |
HIP 49660 |
5.03 |
| 2026-05-29 00:00 |
10:08:04.91 |
+08:04:53.4 |
HIP 49660 |
4.12 |
| 2026-05-29 12:00 |
10:08:09.68 |
+08:04:49.0 |
HIP 49660 |
3.34 |
| 2026-05-30 00:00 |
10:08:14.56 |
+08:04:43.9 |
HIP 49660 |
2.84 |
| 2026-05-30 12:00 |
10:08:19.54 |
+08:04:38.2 |
HIP 49660 |
2.80 |
| 2026-05-31 00:00 |
10:08:24.62 |
+08:04:31.8 |
HIP 49660 |
3.27 |
| 2026-05-31 12:00 |
10:08:29.81 |
+08:04:24.8 |
HIP 49660 |
4.11 |
| 2026-06-01 00:00 |
10:08:35.11 |
+08:04:17.2 |
HIP 49660 |
5.16 |
| 2026-06-01 12:00 |
10:08:40.51 |
+08:04:08.8 |
HIP 49660 |
6.33 |
| 2026-06-02 00:00 |
10:08:46.01 |
+08:03:59.9 |
HIP 49660 |
7.58 |