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) |
| 2026-05-12 00:00 |
09:55:17.03 |
+27:54:38.8 |
HIP 48541 |
21.53 |
| 2026-05-12 12:00 |
09:55:15.74 |
+27:54:19.6 |
HIP 48541 |
21.11 |
| 2026-05-13 00:00 |
09:55:14.50 |
+27:54:00.2 |
HIP 48541 |
20.69 |
| 2026-05-13 12:00 |
09:55:13.32 |
+27:53:40.6 |
HIP 48541 |
20.29 |
| 2026-05-14 00:00 |
09:55:12.20 |
+27:53:20.6 |
HIP 48541 |
19.89 |
| 2026-05-14 12:00 |
09:55:11.14 |
+27:53:00.5 |
HIP 48541 |
19.51 |
| 2026-05-15 00:00 |
09:55:10.13 |
+27:52:40.1 |
HIP 48541 |
19.13 |
| 2026-05-15 12:00 |
09:55:09.17 |
+27:52:19.4 |
HIP 48541 |
18.76 |
| 2026-05-16 00:00 |
09:55:08.28 |
+27:51:58.5 |
HIP 48541 |
18.40 |
| 2026-05-16 12:00 |
09:55:07.44 |
+27:51:37.4 |
HIP 48541 |
18.05 |
| 2026-05-17 00:00 |
09:55:06.66 |
+27:51:16.0 |
HIP 48541 |
17.71 |
| 2026-05-17 12:00 |
09:55:05.93 |
+27:50:54.4 |
HIP 48541 |
17.39 |
| 2026-05-18 00:00 |
09:55:05.26 |
+27:50:32.6 |
HIP 48541 |
17.07 |
| 2026-05-18 12:00 |
09:55:04.64 |
+27:50:10.5 |
HIP 48541 |
16.77 |
| 2026-05-19 00:00 |
09:55:04.08 |
+27:49:48.2 |
HIP 48541 |
16.47 |
| 2026-05-19 12:00 |
09:55:03.58 |
+27:49:25.6 |
HIP 48541 |
16.20 |
| 2026-05-20 00:00 |
09:55:03.13 |
+27:49:02.9 |
HIP 48541 |
15.93 |
| 2026-05-20 12:00 |
09:55:02.74 |
+27:48:39.9 |
HIP 48541 |
15.68 |
| 2026-05-21 00:00 |
09:55:02.41 |
+27:48:16.7 |
HIP 48541 |
15.45 |
| 2026-05-21 12:00 |
09:55:02.13 |
+27:47:53.3 |
HIP 48541 |
15.23 |
| 2026-05-22 00:00 |
09:55:01.90 |
+27:47:29.6 |
HIP 48541 |
15.03 |
| 2026-05-22 12:00 |
09:55:01.73 |
+27:47:05.8 |
HIP 48541 |
14.85 |
| 2026-05-23 00:00 |
09:55:01.61 |
+27:46:41.7 |
HIP 48541 |
14.68 |
| 2026-05-23 12:00 |
09:55:01.55 |
+27:46:17.5 |
HIP 48541 |
14.54 |
| 2026-05-24 00:00 |
09:55:01.54 |
+27:45:53.0 |
HIP 48541 |
14.41 |
| 2026-05-24 12:00 |
09:55:01.59 |
+27:45:28.3 |
HIP 48541 |
14.31 |
| 2026-05-25 00:00 |
09:55:01.69 |
+27:45:03.5 |
HIP 48541 |
14.23 |
| 2026-05-25 12:00 |
09:55:01.84 |
+27:44:38.4 |
HIP 48541 |
14.17 |
| 2026-05-26 00:00 |
09:55:02.05 |
+27:44:13.1 |
HIP 48541 |
14.14 |
| 2026-05-26 12:00 |
09:55:02.31 |
+27:43:47.7 |
HIP 48541 |
14.12 |
| 2026-05-27 00:00 |
09:55:02.62 |
+27:43:22.0 |
HIP 48541 |
14.14 |
| 2026-05-27 12:00 |
09:55:02.99 |
+27:42:56.2 |
HIP 48541 |
14.18 |
| 2026-05-28 00:00 |
09:55:03.41 |
+27:42:30.1 |
HIP 48541 |
14.24 |
| 2026-05-28 12:00 |
09:55:03.88 |
+27:42:03.9 |
HIP 48541 |
14.33 |
| 2026-05-29 00:00 |
09:55:04.40 |
+27:41:37.5 |
HIP 48541 |
14.44 |
| 2026-05-29 12:00 |
09:55:04.98 |
+27:41:11.0 |
HIP 48541 |
14.58 |
| 2026-05-30 00:00 |
09:55:05.61 |
+27:40:44.2 |
HIP 48541 |
14.74 |
| 2026-05-30 12:00 |
09:55:06.29 |
+27:40:17.3 |
HIP 48541 |
14.93 |
| 2026-05-31 00:00 |
09:55:07.02 |
+27:39:50.2 |
HIP 48541 |
15.14 |
| 2026-05-31 12:00 |
09:55:07.80 |
+27:39:22.9 |
HIP 48541 |
15.37 |
| 2026-06-01 00:00 |
09:55:08.64 |
+27:38:55.5 |
HIP 48541 |
15.63 |
| 2026-06-01 12:00 |
09:55:09.52 |
+27:38:27.9 |
HIP 48541 |
15.91 |
| 2026-06-02 00:00 |
09:55:10.46 |
+27:38:00.1 |
HIP 48541 |
16.22 |