메타데이터
| 항목 |
값 |
| Designation |
48P/Johnson |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-08-12T05:28:50.278080Z |
| Orbit solution date (soln_date, UTC) |
2026-03-12T09:26:08Z |
| Obs used |
2209 |
| NEO |
- |
| M1 |
9.100 |
| K1 |
16.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-03-18.0000000 |
| e |
0.42708390 |
| q (au) |
2.004538 |
| a (au) |
3.498834 |
| i (deg) |
12.207024 |
| Ω (om, deg) |
110.130831 |
| ω (w, deg) |
216.574132 |
| M (ma, deg) |
32.795970 |
밝기
산란 + 전체 선형
$$
M_a = (8.552 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.552 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.874 |
| k |
0.999 |
| 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) |
| 2026-06-01 00:00 |
05:25:53.94 |
+19:08:08.5 |
HIP 25534 |
26.33 |
| 2026-06-01 12:00 |
05:26:33.25 |
+19:09:19.8 |
HIP 25534 |
17.48 |
| 2026-06-02 00:00 |
05:27:12.55 |
+19:10:30.3 |
HIP 25534 |
9.64 |
| 2026-06-02 12:00 |
05:27:51.85 |
+19:11:40.0 |
HIP 25534 |
7.44 |
| 2026-06-03 00:00 |
05:28:31.14 |
+19:12:48.9 |
HIP 25534 |
13.88 |
| 2026-06-03 12:00 |
05:29:10.43 |
+19:13:57.0 |
HIP 25534 |
22.46 |
| 2026-06-04 00:00 |
05:29:49.71 |
+19:15:04.2 |
HIP 25867 |
25.39 |
| 2026-06-04 12:00 |
05:30:28.98 |
+19:16:10.7 |
HIP 25867 |
19.11 |
| 2026-06-05 00:00 |
05:31:08.25 |
+19:17:16.3 |
HIP 25867 |
16.11 |
| 2026-06-05 12:00 |
05:31:47.50 |
+19:18:21.2 |
HIP 25965 |
13.69 |
| 2026-06-06 00:00 |
05:32:26.75 |
+19:19:25.2 |
HIP 25965 |
12.12 |
| 2026-06-06 12:00 |
05:33:05.99 |
+19:20:28.5 |
HIP 25965 |
16.73 |
| 2026-06-07 00:00 |
05:33:45.22 |
+19:21:30.9 |
HIP 25965 |
24.21 |
| 2026-06-07 12:00 |
05:34:24.44 |
+19:22:32.6 |
HIP 26298 |
25.38 |
| 2026-06-08 00:00 |
05:35:03.64 |
+19:23:33.4 |
HIP 26298 |
16.78 |
| 2026-06-08 12:00 |
05:35:42.84 |
+19:24:33.5 |
HIP 26298 |
9.61 |
| 2026-06-09 00:00 |
05:36:22.02 |
+19:25:32.7 |
HIP 26298 |
8.72 |
| 2026-06-09 12:00 |
05:37:01.20 |
+19:26:31.2 |
HIP 26298 |
15.24 |
| 2026-06-10 00:00 |
05:37:40.35 |
+19:27:28.9 |
HIP 26438 |
19.34 |
| 2026-06-10 12:00 |
05:38:19.50 |
+19:28:25.8 |
HIP 26438 |
21.19 |
| 2026-06-11 00:00 |
05:38:58.63 |
+19:29:21.9 |
HIP 26677 |
20.26 |
| 2026-06-11 12:00 |
05:39:37.74 |
+19:30:17.2 |
HIP 26677 |
12.93 |
| 2026-06-12 00:00 |
05:40:16.84 |
+19:31:11.7 |
HIP 26677 |
9.78 |
| 2026-06-12 12:00 |
05:40:55.93 |
+19:32:05.4 |
HIP 26677 |
13.98 |
| 2026-06-13 00:00 |
05:41:34.99 |
+19:32:58.4 |
HIP 26826 |
11.75 |
| 2026-06-13 12:00 |
05:42:14.04 |
+19:33:50.5 |
HIP 26826 |
14.28 |
| 2026-06-14 00:00 |
05:42:53.07 |
+19:34:41.9 |
HIP 26916 |
16.17 |
| 2026-06-14 12:00 |
05:43:32.08 |
+19:35:32.5 |
HIP 26916 |
18.28 |
| 2026-06-15 00:00 |
05:44:11.07 |
+19:36:22.3 |
HIP 27171 |
22.68 |
| 2026-06-15 12:00 |
05:44:50.04 |
+19:37:11.4 |
HIP 27171 |
16.54 |
| 2026-06-16 00:00 |
05:45:28.99 |
+19:37:59.6 |
HIP 27171 |
14.21 |
| 2026-06-16 12:00 |
05:46:07.91 |
+19:38:47.1 |
HIP 27171 |
17.32 |
| 2026-06-17 00:00 |
05:46:46.82 |
+19:39:33.8 |
HIP 27171 |
23.80 |
| 2026-06-17 12:00 |
05:47:25.69 |
+19:40:19.8 |
HIP 27266 |
31.51 |
| 2026-06-18 00:00 |
05:48:04.55 |
+19:41:05.0 |
HIP 27266 |
34.68 |
| 2026-06-18 12:00 |
05:48:43.37 |
+19:41:49.4 |
HIP 27465 |
37.39 |
| 2026-06-19 00:00 |
05:49:22.18 |
+19:42:33.1 |
HIP 27697 |
37.06 |
| 2026-06-19 12:00 |
05:50:00.95 |
+19:43:16.0 |
HIP 27697 |
28.78 |
| 2026-06-20 00:00 |
05:50:39.70 |
+19:43:58.1 |
HIP 27697 |
21.25 |
| 2026-06-20 12:00 |
05:51:18.42 |
+19:44:39.5 |
HIP 27697 |
15.55 |
| 2026-06-21 00:00 |
05:51:57.11 |
+19:45:20.2 |
HIP 27747 |
9.15 |
| 2026-06-21 12:00 |
05:52:35.77 |
+19:46:00.1 |
HIP 27747 |
6.73 |
| 2026-06-22 00:00 |
05:53:14.40 |
+19:46:39.2 |
HIP 27747 |
13.16 |