메타데이터
| 항목 |
값 |
| Designation |
C/2018 KJ3 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2019-09-09T23:33:42.448320Z |
| Orbit solution date (soln_date, UTC) |
2021-09-04T23:42:57Z |
| Obs used |
465 |
| NEO |
- |
| M1 |
6.400 |
| K1 |
13.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2018-08-10.0000000 |
| e |
0.99581434 |
| q (au) |
3.627197 |
| a (au) |
866.577156 |
| i (deg) |
136.667328 |
| Ω (om, deg) |
91.587697 |
| ω (w, deg) |
217.709783 |
| M (ma, deg) |
359.984701 |
밝기
산란 + 전체 선형
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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 |
06:44:34.31 |
+10:56:14.6 |
HIP 32337 |
12.65 |
| 2026-03-26 12:00 |
06:44:32.90 |
+10:56:50.3 |
HIP 32337 |
13.34 |
| 2026-03-27 00:00 |
06:44:31.55 |
+10:57:25.8 |
HIP 32337 |
14.02 |
| 2026-03-27 12:00 |
06:44:30.27 |
+10:58:01.2 |
HIP 32337 |
14.68 |
| 2026-03-28 00:00 |
06:44:29.06 |
+10:58:36.6 |
HIP 32337 |
15.34 |
| 2026-03-28 12:00 |
06:44:27.90 |
+10:59:11.8 |
HIP 32337 |
16.00 |
| 2026-03-29 00:00 |
06:44:26.81 |
+10:59:46.9 |
HIP 32220 |
15.99 |
| 2026-03-29 12:00 |
06:44:25.79 |
+11:00:21.9 |
HIP 32220 |
15.45 |
| 2026-03-30 00:00 |
06:44:24.82 |
+11:00:56.8 |
HIP 32220 |
14.93 |
| 2026-03-30 12:00 |
06:44:23.92 |
+11:01:31.6 |
HIP 32220 |
14.43 |
| 2026-03-31 00:00 |
06:44:23.09 |
+11:02:06.3 |
HIP 32220 |
13.96 |
| 2026-03-31 12:00 |
06:44:22.31 |
+11:02:40.8 |
HIP 32220 |
13.51 |
| 2026-04-01 00:00 |
06:44:21.60 |
+11:03:15.3 |
HIP 32220 |
13.09 |
| 2026-04-01 12:00 |
06:44:20.95 |
+11:03:49.6 |
HIP 32220 |
12.70 |
| 2026-04-02 00:00 |
06:44:20.36 |
+11:04:23.8 |
HIP 32220 |
12.34 |
| 2026-04-02 12:00 |
06:44:19.84 |
+11:04:57.9 |
HIP 32220 |
12.02 |
| 2026-04-03 00:00 |
06:44:19.37 |
+11:05:31.9 |
HIP 32220 |
11.73 |
| 2026-04-03 12:00 |
06:44:18.97 |
+11:06:05.7 |
HIP 32220 |
11.47 |
| 2026-04-04 00:00 |
06:44:18.63 |
+11:06:39.5 |
HIP 32220 |
11.26 |
| 2026-04-04 12:00 |
06:44:18.35 |
+11:07:13.1 |
HIP 32220 |
11.08 |
| 2026-04-05 00:00 |
06:44:18.13 |
+11:07:46.6 |
HIP 32220 |
10.95 |
| 2026-04-05 12:00 |
06:44:17.98 |
+11:08:19.9 |
HIP 32220 |
10.86 |
| 2026-04-06 00:00 |
06:44:17.88 |
+11:08:53.2 |
HIP 32220 |
10.81 |
| 2026-04-06 12:00 |
06:44:17.85 |
+11:09:26.3 |
HIP 32220 |
10.81 |
| 2026-04-07 00:00 |
06:44:17.88 |
+11:09:59.2 |
HIP 32220 |
10.85 |
| 2026-04-07 12:00 |
06:44:17.96 |
+11:10:32.1 |
HIP 32220 |
10.93 |
| 2026-04-08 00:00 |
06:44:18.11 |
+11:11:04.8 |
HIP 32220 |
11.05 |
| 2026-04-08 12:00 |
06:44:18.32 |
+11:11:37.4 |
HIP 32220 |
11.21 |
| 2026-04-09 00:00 |
06:44:18.59 |
+11:12:09.8 |
HIP 32220 |
11.41 |
| 2026-04-09 12:00 |
06:44:18.91 |
+11:12:42.1 |
HIP 32220 |
11.64 |
| 2026-04-10 00:00 |
06:44:19.30 |
+11:13:14.3 |
HIP 32220 |
11.91 |
| 2026-04-10 12:00 |
06:44:19.75 |
+11:13:46.3 |
HIP 32220 |
12.20 |
| 2026-04-11 00:00 |
06:44:20.26 |
+11:14:18.2 |
HIP 32220 |
12.53 |
| 2026-04-11 12:00 |
06:44:20.82 |
+11:14:50.0 |
HIP 32220 |
12.88 |
| 2026-04-12 00:00 |
06:44:21.45 |
+11:15:21.6 |
HIP 32220 |
13.26 |
| 2026-04-12 12:00 |
06:44:22.13 |
+11:15:53.1 |
HIP 32220 |
13.66 |
| 2026-04-13 00:00 |
06:44:22.87 |
+11:16:24.4 |
HIP 32220 |
14.09 |
| 2026-04-13 12:00 |
06:44:23.67 |
+11:16:55.6 |
HIP 32220 |
14.53 |
| 2026-04-14 00:00 |
06:44:24.53 |
+11:17:26.6 |
HIP 32220 |
14.99 |
| 2026-04-14 12:00 |
06:44:25.45 |
+11:17:57.5 |
HIP 32220 |
15.46 |
| 2026-04-15 00:00 |
06:44:26.42 |
+11:18:28.3 |
HIP 32220 |
15.96 |
| 2026-04-15 12:00 |
06:44:27.45 |
+11:18:58.9 |
HIP 32220 |
16.46 |
| 2026-04-16 00:00 |
06:44:28.54 |
+11:19:29.3 |
HIP 32220 |
16.98 |