메타데이터
| 항목 |
값 |
| Designation |
C/1972 U1 (Kojima) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1973-02-12T06:40:27.632640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:22Z |
| Obs used |
267 |
| NEO |
- |
| M1 |
6.400 |
| K1 |
12.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1973-01-19.0000000 |
| e |
1.00104251 |
| q (au) |
2.147034 |
| a (au) |
-2059.482629 |
| i (deg) |
141.855558 |
| Ω (om, deg) |
43.188266 |
| ω (w, deg) |
334.305975 |
| M (ma, deg) |
-0.000256 |
밝기
산란 + 전체 선형
$$
M_a = (5.867 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.867 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.559 |
| k |
0.800 |
| 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) |
| 2026-09-20 00:00 |
17:25:31.18 |
+02:33:50.8 |
HIP 85390 |
24.74 |
| 2026-09-20 12:00 |
17:25:31.30 |
+02:33:40.6 |
HIP 85390 |
24.62 |
| 2026-09-21 00:00 |
17:25:31.43 |
+02:33:30.4 |
HIP 85390 |
24.51 |
| 2026-09-21 12:00 |
17:25:31.57 |
+02:33:20.3 |
HIP 85390 |
24.39 |
| 2026-09-22 00:00 |
17:25:31.73 |
+02:33:10.1 |
HIP 85390 |
24.27 |
| 2026-09-22 12:00 |
17:25:31.90 |
+02:33:00.0 |
HIP 85390 |
24.14 |
| 2026-09-23 00:00 |
17:25:32.08 |
+02:32:49.7 |
HIP 85390 |
24.02 |
| 2026-09-23 12:00 |
17:25:32.28 |
+02:32:39.6 |
HIP 85390 |
23.89 |
| 2026-09-24 00:00 |
17:25:32.48 |
+02:32:29.4 |
HIP 85390 |
23.76 |
| 2026-09-24 12:00 |
17:25:32.71 |
+02:32:19.2 |
HIP 85390 |
23.63 |
| 2026-09-25 00:00 |
17:25:32.94 |
+02:32:09.1 |
HIP 85390 |
23.50 |
| 2026-09-25 12:00 |
17:25:33.18 |
+02:31:58.9 |
HIP 85390 |
23.36 |
| 2026-09-26 00:00 |
17:25:33.44 |
+02:31:48.8 |
HIP 85390 |
23.22 |
| 2026-09-26 12:00 |
17:25:33.71 |
+02:31:38.6 |
HIP 85390 |
23.08 |
| 2026-09-27 00:00 |
17:25:34.00 |
+02:31:28.5 |
HIP 85390 |
22.94 |
| 2026-09-27 12:00 |
17:25:34.29 |
+02:31:18.4 |
HIP 85390 |
22.80 |
| 2026-09-28 00:00 |
17:25:34.60 |
+02:31:08.3 |
HIP 85390 |
22.65 |
| 2026-09-28 12:00 |
17:25:34.92 |
+02:30:58.2 |
HIP 85390 |
22.50 |
| 2026-09-29 00:00 |
17:25:35.26 |
+02:30:48.1 |
HIP 85390 |
22.35 |
| 2026-09-29 12:00 |
17:25:35.60 |
+02:30:38.0 |
HIP 85390 |
22.20 |
| 2026-09-30 00:00 |
17:25:35.96 |
+02:30:27.9 |
HIP 85390 |
22.04 |
| 2026-09-30 12:00 |
17:25:36.33 |
+02:30:17.9 |
HIP 85390 |
21.88 |
| 2026-10-01 00:00 |
17:25:36.72 |
+02:30:07.8 |
HIP 85390 |
21.73 |
| 2026-10-01 12:00 |
17:25:37.11 |
+02:29:57.8 |
HIP 85390 |
21.56 |
| 2026-10-02 00:00 |
17:25:37.52 |
+02:29:47.8 |
HIP 85390 |
21.40 |
| 2026-10-02 12:00 |
17:25:37.94 |
+02:29:37.8 |
HIP 85390 |
21.24 |
| 2026-10-03 00:00 |
17:25:38.38 |
+02:29:27.8 |
HIP 85390 |
21.07 |
| 2026-10-03 12:00 |
17:25:38.82 |
+02:29:17.9 |
HIP 85390 |
20.90 |
| 2026-10-04 00:00 |
17:25:39.28 |
+02:29:07.9 |
HIP 85390 |
20.73 |
| 2026-10-04 12:00 |
17:25:39.75 |
+02:28:58.0 |
HIP 85390 |
20.55 |
| 2026-10-05 00:00 |
17:25:40.23 |
+02:28:48.1 |
HIP 85390 |
20.37 |
| 2026-10-05 12:00 |
17:25:40.72 |
+02:28:38.2 |
HIP 85390 |
20.20 |
| 2026-10-06 00:00 |
17:25:41.23 |
+02:28:28.3 |
HIP 85390 |
20.02 |
| 2026-10-06 12:00 |
17:25:41.75 |
+02:28:18.5 |
HIP 85390 |
19.83 |
| 2026-10-07 00:00 |
17:25:42.28 |
+02:28:08.6 |
HIP 85390 |
19.65 |
| 2026-10-07 12:00 |
17:25:42.82 |
+02:27:58.8 |
HIP 85390 |
19.46 |
| 2026-10-08 00:00 |
17:25:43.38 |
+02:27:49.1 |
HIP 85390 |
19.27 |
| 2026-10-08 12:00 |
17:25:43.94 |
+02:27:39.3 |
HIP 85390 |
19.08 |
| 2026-10-09 00:00 |
17:25:44.52 |
+02:27:29.6 |
HIP 85390 |
18.89 |
| 2026-10-09 12:00 |
17:25:45.11 |
+02:27:19.9 |
HIP 85390 |
18.69 |
| 2026-10-10 00:00 |
17:25:45.72 |
+02:27:10.2 |
HIP 85390 |
18.49 |
| 2026-10-10 12:00 |
17:25:46.33 |
+02:27:00.5 |
HIP 85390 |
18.29 |
| 2026-10-11 00:00 |
17:25:46.96 |
+02:26:50.9 |
HIP 85390 |
18.09 |