메타데이터
| 항목 |
값 |
| Designation |
C/2018 K1 (Weiland) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2018-04-06T21:34:06.764160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:43Z |
| Obs used |
163 |
| NEO |
- |
| M1 |
12.500 |
| K1 |
14.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2018-05-25T13:00:23.616000Z |
| Discovery magnitude (MPC) |
17.30 o |
| Discovery observatory (MPC) |
T08 · ATLAS-MLO, Mauna Loa |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2018-06-04.0000000 |
| e |
0.93721411 |
| q (au) |
1.879169 |
| a (au) |
29.929796 |
| i (deg) |
164.192707 |
| Ω (om, deg) |
260.001799 |
| ω (w, deg) |
325.002910 |
| M (ma, deg) |
0.349731 |
밝기
산란 + 전체 선형
$$
M_a = (12.352 + 5.304\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.352 |
| n |
5.304 |
| gf |
1.000 |
| gb |
-0.785 |
| k |
0.997 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
10:01:25.47 |
+28:01:26.4 |
HIP 49060 |
13.49 |
| 2026-03-26 12:00 |
10:01:19.22 |
+28:01:38.6 |
HIP 49060 |
12.35 |
| 2026-03-27 00:00 |
10:01:13.01 |
+28:01:50.4 |
HIP 49060 |
11.28 |
| 2026-03-27 12:00 |
10:01:06.85 |
+28:02:01.8 |
HIP 49060 |
10.30 |
| 2026-03-28 00:00 |
10:01:00.73 |
+28:02:12.8 |
HIP 49060 |
9.42 |
| 2026-03-28 12:00 |
10:00:54.65 |
+28:02:23.5 |
HIP 49060 |
8.68 |
| 2026-03-29 00:00 |
10:00:48.61 |
+28:02:33.7 |
HIP 49060 |
8.11 |
| 2026-03-29 12:00 |
10:00:42.62 |
+28:02:43.6 |
HIP 49060 |
7.73 |
| 2026-03-30 00:00 |
10:00:36.67 |
+28:02:53.2 |
HIP 49060 |
7.59 |
| 2026-03-30 12:00 |
10:00:30.76 |
+28:03:02.3 |
HIP 49060 |
7.67 |
| 2026-03-31 00:00 |
10:00:24.90 |
+28:03:11.1 |
HIP 49060 |
7.97 |
| 2026-03-31 12:00 |
10:00:19.08 |
+28:03:19.4 |
HIP 49060 |
8.47 |
| 2026-04-01 00:00 |
10:00:13.31 |
+28:03:27.5 |
HIP 49060 |
9.12 |
| 2026-04-01 12:00 |
10:00:07.58 |
+28:03:35.1 |
HIP 49060 |
9.89 |
| 2026-04-02 00:00 |
10:00:01.90 |
+28:03:42.4 |
HIP 49060 |
10.75 |
| 2026-04-02 12:00 |
09:59:56.26 |
+28:03:49.2 |
HIP 49060 |
11.68 |
| 2026-04-03 00:00 |
09:59:50.67 |
+28:03:55.8 |
HIP 49060 |
12.66 |
| 2026-04-03 12:00 |
09:59:45.13 |
+28:04:01.9 |
HIP 49060 |
13.67 |
| 2026-04-04 00:00 |
09:59:39.63 |
+28:04:07.7 |
HIP 49060 |
14.71 |
| 2026-04-04 12:00 |
09:59:34.18 |
+28:04:13.1 |
HIP 49060 |
15.77 |
| 2026-04-05 00:00 |
09:59:28.78 |
+28:04:18.1 |
HIP 49060 |
16.84 |
| 2026-04-05 12:00 |
09:59:23.43 |
+28:04:22.7 |
HIP 49060 |
17.92 |
| 2026-04-06 00:00 |
09:59:18.12 |
+28:04:27.0 |
HIP 49060 |
19.00 |
| 2026-04-06 12:00 |
09:59:12.86 |
+28:04:30.9 |
HIP 49060 |
20.09 |
| 2026-04-07 00:00 |
09:59:07.65 |
+28:04:34.5 |
HIP 48895 |
21.13 |
| 2026-04-07 12:00 |
09:59:02.49 |
+28:04:37.7 |
HIP 48895 |
20.71 |
| 2026-04-08 00:00 |
09:58:57.38 |
+28:04:40.5 |
HIP 48895 |
20.34 |
| 2026-04-08 12:00 |
09:58:52.32 |
+28:04:42.9 |
HIP 48895 |
20.03 |
| 2026-04-09 00:00 |
09:58:47.31 |
+28:04:45.0 |
HIP 48895 |
19.77 |
| 2026-04-09 12:00 |
09:58:42.35 |
+28:04:46.7 |
HIP 48895 |
19.57 |
| 2026-04-10 00:00 |
09:58:37.44 |
+28:04:48.1 |
HIP 48895 |
19.42 |
| 2026-04-10 12:00 |
09:58:32.58 |
+28:04:49.0 |
HIP 48895 |
19.33 |
| 2026-04-11 00:00 |
09:58:27.78 |
+28:04:49.7 |
HIP 48895 |
19.29 |
| 2026-04-11 12:00 |
09:58:23.02 |
+28:04:49.9 |
HIP 48895 |
19.30 |
| 2026-04-12 00:00 |
09:58:18.31 |
+28:04:49.8 |
HIP 48777 |
18.31 |
| 2026-04-12 12:00 |
09:58:13.66 |
+28:04:49.4 |
HIP 48777 |
17.28 |
| 2026-04-13 00:00 |
09:58:09.06 |
+28:04:48.5 |
HIP 48777 |
16.27 |
| 2026-04-13 12:00 |
09:58:04.51 |
+28:04:47.4 |
HIP 48777 |
15.27 |
| 2026-04-14 00:00 |
09:58:00.02 |
+28:04:45.8 |
HIP 48777 |
14.29 |
| 2026-04-14 12:00 |
09:57:55.58 |
+28:04:44.0 |
HIP 48777 |
13.31 |
| 2026-04-15 00:00 |
09:57:51.19 |
+28:04:41.7 |
HIP 48777 |
12.35 |
| 2026-04-15 12:00 |
09:57:46.85 |
+28:04:39.1 |
HIP 48777 |
11.40 |
| 2026-04-16 00:00 |
09:57:42.57 |
+28:04:36.2 |
HIP 48777 |
10.47 |