| Parameter |
Value |
| Designation |
P/2017 K3 (Gasparovic) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-05-31T11:45:35.870400Z |
| Orbit solution date (soln_date, UTC) |
2021-07-01T22:13:00Z |
| Obs used |
99 |
| NEO |
- |
| M1 |
7.600 |
| K1 |
29.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2017-06-04.0000000 |
| e |
0.58118013 |
| q (au) |
2.334209 |
| a (au) |
5.573301 |
| i (deg) |
4.279072 |
| Ω (om, deg) |
354.328342 |
| ω (w, deg) |
253.209247 |
| M (ma, deg) |
0.262932 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.811 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.811 |
| n |
6.000 |
| gf |
0.996 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
9.999 |
| 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 |
06:28:09.53 |
+27:05:16.2 |
HIP 30880 |
12.67 |
| 2026-07-29 12:00 |
06:28:26.52 |
+27:05:10.7 |
HIP 30880 |
9.74 |
| 2026-07-30 00:00 |
06:28:43.46 |
+27:05:05.3 |
HIP 30893 |
6.69 |
| 2026-07-30 12:00 |
06:29:00.36 |
+27:04:59.9 |
HIP 30893 |
4.56 |
| 2026-07-31 00:00 |
06:29:17.22 |
+27:04:54.4 |
HIP 30893 |
5.02 |
| 2026-07-31 12:00 |
06:29:34.03 |
+27:04:49.0 |
HIP 30893 |
7.59 |
| 2026-08-01 00:00 |
06:29:50.80 |
+27:04:43.6 |
HIP 30984 |
8.80 |
| 2026-08-01 12:00 |
06:30:07.52 |
+27:04:38.2 |
HIP 30984 |
7.67 |
| 2026-08-02 00:00 |
06:30:24.19 |
+27:04:32.8 |
HIP 30984 |
8.24 |
| 2026-08-02 12:00 |
06:30:40.82 |
+27:04:27.5 |
HIP 30984 |
10.22 |
| 2026-08-03 00:00 |
06:30:57.40 |
+27:04:22.1 |
HIP 30984 |
12.97 |
| 2026-08-03 12:00 |
06:31:13.93 |
+27:04:16.8 |
HIP 30984 |
16.09 |
| 2026-08-04 00:00 |
06:31:30.42 |
+27:04:11.4 |
HIP 30984 |
19.40 |
| 2026-08-04 12:00 |
06:31:46.85 |
+27:04:06.1 |
HIP 30984 |
22.81 |
| 2026-08-05 00:00 |
06:32:03.23 |
+27:04:00.9 |
HIP 31213 |
21.47 |
| 2026-08-05 12:00 |
06:32:19.57 |
+27:03:55.6 |
HIP 31213 |
19.84 |
| 2026-08-06 00:00 |
06:32:35.85 |
+27:03:50.4 |
HIP 31310 |
18.32 |
| 2026-08-06 12:00 |
06:32:52.07 |
+27:03:45.2 |
HIP 31310 |
14.71 |
| 2026-08-07 00:00 |
06:33:08.25 |
+27:03:40.0 |
HIP 31310 |
11.11 |
| 2026-08-07 12:00 |
06:33:24.37 |
+27:03:34.8 |
HIP 31310 |
7.53 |
| 2026-08-08 00:00 |
06:33:40.44 |
+27:03:29.7 |
HIP 31310 |
3.98 |
| 2026-08-08 12:00 |
06:33:56.45 |
+27:03:24.6 |
HIP 31310 |
0.80 |
| 2026-08-09 00:00 |
06:34:12.40 |
+27:03:19.6 |
HIP 31310 |
3.28 |
| 2026-08-09 12:00 |
06:34:28.30 |
+27:03:14.5 |
HIP 31310 |
6.78 |
| 2026-08-10 00:00 |
06:34:44.14 |
+27:03:09.6 |
HIP 31310 |
10.29 |
| 2026-08-10 12:00 |
06:34:59.92 |
+27:03:04.6 |
HIP 31310 |
13.80 |
| 2026-08-11 00:00 |
06:35:15.64 |
+27:02:59.7 |
HIP 31310 |
17.30 |
| 2026-08-11 12:00 |
06:35:31.31 |
+27:02:54.8 |
HIP 31568 |
18.44 |
| 2026-08-12 00:00 |
06:35:46.91 |
+27:02:50.0 |
HIP 31568 |
16.41 |
| 2026-08-12 12:00 |
06:36:02.45 |
+27:02:45.2 |
HIP 31568 |
14.93 |
| 2026-08-13 00:00 |
06:36:17.92 |
+27:02:40.5 |
HIP 31568 |
14.16 |
| 2026-08-13 12:00 |
06:36:33.34 |
+27:02:35.8 |
HIP 31568 |
14.21 |
| 2026-08-14 00:00 |
06:36:48.68 |
+27:02:31.2 |
HIP 31568 |
15.05 |
| 2026-08-14 12:00 |
06:37:03.97 |
+27:02:26.6 |
HIP 31568 |
16.56 |
| 2026-08-15 00:00 |
06:37:19.19 |
+27:02:22.1 |
HIP 31568 |
18.56 |
| 2026-08-15 12:00 |
06:37:34.34 |
+27:02:17.6 |
HIP 31759 |
15.79 |
| 2026-08-16 00:00 |
06:37:49.43 |
+27:02:13.2 |
HIP 31759 |
12.95 |
| 2026-08-16 12:00 |
06:38:04.44 |
+27:02:08.9 |
HIP 31759 |
10.44 |
| 2026-08-17 00:00 |
06:38:19.39 |
+27:02:04.6 |
HIP 31759 |
8.54 |
| 2026-08-17 12:00 |
06:38:34.27 |
+27:02:00.3 |
HIP 31759 |
7.68 |
| 2026-08-18 00:00 |
06:38:49.08 |
+27:01:56.2 |
HIP 31759 |
8.19 |
| 2026-08-18 12:00 |
06:39:03.82 |
+27:01:52.1 |
HIP 31759 |
9.83 |
| 2026-08-19 00:00 |
06:39:18.49 |
+27:01:48.0 |
HIP 31759 |
12.15 |