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
$$
M_a = (8.621 + 5.913\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.621 |
| n |
5.913 |
| gf |
0.997 |
| gb |
-0.880 |
| 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) |
| 2026-05-12 00:00 |
04:59:44.14 |
+18:09:21.4 |
HIP 23139 |
17.34 |
| 2026-05-12 12:00 |
05:00:23.15 |
+18:11:05.8 |
HIP 23139 |
26.18 |
| 2026-05-13 00:00 |
05:01:02.18 |
+18:12:49.3 |
HIP 23139 |
35.33 |
| 2026-05-13 12:00 |
05:01:41.23 |
+18:14:32.0 |
HIP 23401 |
32.13 |
| 2026-05-14 00:00 |
05:02:20.30 |
+18:16:13.9 |
HIP 23401 |
31.47 |
| 2026-05-14 12:00 |
05:02:59.39 |
+18:17:54.9 |
HIP 23632 |
26.41 |
| 2026-05-15 00:00 |
05:03:38.49 |
+18:19:35.1 |
HIP 23632 |
17.53 |
| 2026-05-15 12:00 |
05:04:17.62 |
+18:21:14.5 |
HIP 23632 |
9.76 |
| 2026-05-16 00:00 |
05:04:56.76 |
+18:22:53.1 |
HIP 23632 |
7.81 |
| 2026-05-16 12:00 |
05:05:35.92 |
+18:24:30.8 |
HIP 23632 |
14.30 |
| 2026-05-17 00:00 |
05:06:15.10 |
+18:26:07.7 |
HIP 23835 |
21.12 |
| 2026-05-17 12:00 |
05:06:54.29 |
+18:27:43.7 |
HIP 23835 |
13.39 |
| 2026-05-18 00:00 |
05:07:33.49 |
+18:29:19.0 |
HIP 23835 |
9.52 |
| 2026-05-18 12:00 |
05:08:12.71 |
+18:30:53.3 |
HIP 23835 |
13.42 |
| 2026-05-19 00:00 |
05:08:51.94 |
+18:32:26.9 |
HIP 23835 |
21.15 |
| 2026-05-19 12:00 |
05:09:31.18 |
+18:33:59.6 |
HIP 23976 |
23.97 |
| 2026-05-20 00:00 |
05:10:10.44 |
+18:35:31.5 |
HIP 23976 |
26.01 |
| 2026-05-20 12:00 |
05:10:49.70 |
+18:37:02.6 |
HIP 23976 |
30.92 |
| 2026-05-21 00:00 |
05:11:28.97 |
+18:38:32.8 |
HIP 24317 |
24.31 |
| 2026-05-21 12:00 |
05:12:08.25 |
+18:40:02.2 |
HIP 24317 |
16.81 |
| 2026-05-22 00:00 |
05:12:47.54 |
+18:41:30.7 |
HIP 24317 |
12.30 |
| 2026-05-22 12:00 |
05:13:26.83 |
+18:42:58.4 |
HIP 24317 |
14.05 |
| 2026-05-23 00:00 |
05:14:06.13 |
+18:44:25.3 |
HIP 24435 |
9.34 |
| 2026-05-23 12:00 |
05:14:45.44 |
+18:45:51.4 |
HIP 24435 |
8.99 |
| 2026-05-24 00:00 |
05:15:24.75 |
+18:47:16.6 |
HIP 24533 |
10.70 |
| 2026-05-24 12:00 |
05:16:04.07 |
+18:48:41.0 |
HIP 24533 |
10.96 |
| 2026-05-25 00:00 |
05:16:43.39 |
+18:50:04.6 |
HIP 24533 |
17.40 |
| 2026-05-25 12:00 |
05:17:22.71 |
+18:51:27.4 |
HIP 24533 |
25.74 |
| 2026-05-26 00:00 |
05:18:02.04 |
+18:52:49.3 |
HIP 24615 |
30.84 |
| 2026-05-26 12:00 |
05:18:41.36 |
+18:54:10.4 |
HIP 24910 |
30.00 |
| 2026-05-27 00:00 |
05:19:20.69 |
+18:55:30.7 |
HIP 24910 |
24.49 |
| 2026-05-27 12:00 |
05:20:00.02 |
+18:56:50.2 |
HIP 24910 |
21.80 |
| 2026-05-28 00:00 |
05:20:39.35 |
+18:58:08.8 |
HIP 25035 |
14.80 |
| 2026-05-28 12:00 |
05:21:18.68 |
+18:59:26.6 |
HIP 25035 |
7.11 |
| 2026-05-29 00:00 |
05:21:58.01 |
+19:00:43.6 |
HIP 25035 |
7.63 |
| 2026-05-29 12:00 |
05:22:37.34 |
+19:01:59.8 |
HIP 25134 |
2.32 |
| 2026-05-30 00:00 |
05:23:16.66 |
+19:03:15.2 |
HIP 25134 |
7.80 |
| 2026-05-30 12:00 |
05:23:55.99 |
+19:04:29.8 |
HIP 25154 |
17.02 |
| 2026-05-31 00:00 |
05:24:35.31 |
+19:05:43.5 |
HIP 25154 |
25.53 |
| 2026-05-31 12:00 |
05:25:14.62 |
+19:06:56.4 |
HIP 25154 |
34.48 |
| 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 |