메타데이터
| 항목 |
값 |
| Designation |
C/1983 N1 (IRAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1983-05-02T16:52:11.812800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:31Z |
| Obs used |
19 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1983-12-26.0000000 |
| e |
0.99936962 |
| q (au) |
2.418058 |
| a (au) |
3835.864208 |
| i (deg) |
138.832959 |
| Ω (om, deg) |
171.801181 |
| ω (w, deg) |
265.589825 |
| M (ma, deg) |
0.000984 |
밝기
산란 + 전체 선형
$$
M_a = (15.018 + 2.142\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.018 |
| n |
2.142 |
| gf |
1.000 |
| gb |
-0.842 |
| 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 |
08:37:04.91 |
+55:53:16.4 |
HIP 42261 |
2.93 |
| 2026-09-20 12:00 |
08:37:06.73 |
+55:53:26.0 |
HIP 42261 |
3.11 |
| 2026-09-21 00:00 |
08:37:08.52 |
+55:53:35.8 |
HIP 42261 |
3.32 |
| 2026-09-21 12:00 |
08:37:10.30 |
+55:53:45.7 |
HIP 42261 |
3.54 |
| 2026-09-22 00:00 |
08:37:12.05 |
+55:53:55.7 |
HIP 42261 |
3.77 |
| 2026-09-22 12:00 |
08:37:13.79 |
+55:54:05.8 |
HIP 42261 |
4.01 |
| 2026-09-23 00:00 |
08:37:15.51 |
+55:54:16.1 |
HIP 42261 |
4.26 |
| 2026-09-23 12:00 |
08:37:17.20 |
+55:54:26.4 |
HIP 42261 |
4.52 |
| 2026-09-24 00:00 |
08:37:18.88 |
+55:54:36.9 |
HIP 42297 |
4.65 |
| 2026-09-24 12:00 |
08:37:20.53 |
+55:54:47.5 |
HIP 42297 |
4.43 |
| 2026-09-25 00:00 |
08:37:22.17 |
+55:54:58.2 |
HIP 42297 |
4.22 |
| 2026-09-25 12:00 |
08:37:23.78 |
+55:55:09.0 |
HIP 42297 |
4.02 |
| 2026-09-26 00:00 |
08:37:25.38 |
+55:55:20.0 |
HIP 42297 |
3.83 |
| 2026-09-26 12:00 |
08:37:26.95 |
+55:55:31.0 |
HIP 42297 |
3.65 |
| 2026-09-27 00:00 |
08:37:28.50 |
+55:55:42.2 |
HIP 42297 |
3.48 |
| 2026-09-27 12:00 |
08:37:30.04 |
+55:55:53.5 |
HIP 42297 |
3.32 |
| 2026-09-28 00:00 |
08:37:31.55 |
+55:56:04.9 |
HIP 42297 |
3.18 |
| 2026-09-28 12:00 |
08:37:33.03 |
+55:56:16.4 |
HIP 42297 |
3.06 |
| 2026-09-29 00:00 |
08:37:34.50 |
+55:56:28.0 |
HIP 42297 |
2.95 |
| 2026-09-29 12:00 |
08:37:35.95 |
+55:56:39.7 |
HIP 42297 |
2.87 |
| 2026-09-30 00:00 |
08:37:37.37 |
+55:56:51.5 |
HIP 42297 |
2.81 |
| 2026-09-30 12:00 |
08:37:38.77 |
+55:57:03.5 |
HIP 42297 |
2.77 |
| 2026-10-01 00:00 |
08:37:40.15 |
+55:57:15.5 |
HIP 42297 |
2.76 |
| 2026-10-01 12:00 |
08:37:41.51 |
+55:57:27.7 |
HIP 42297 |
2.77 |
| 2026-10-02 00:00 |
08:37:42.85 |
+55:57:40.0 |
HIP 42297 |
2.81 |
| 2026-10-02 12:00 |
08:37:44.16 |
+55:57:52.4 |
HIP 42297 |
2.87 |
| 2026-10-03 00:00 |
08:37:45.45 |
+55:58:04.8 |
HIP 42297 |
2.95 |
| 2026-10-03 12:00 |
08:37:46.72 |
+55:58:17.4 |
HIP 42297 |
3.05 |
| 2026-10-04 00:00 |
08:37:47.97 |
+55:58:30.1 |
HIP 42297 |
3.16 |
| 2026-10-04 12:00 |
08:37:49.19 |
+55:58:42.9 |
HIP 42297 |
3.29 |
| 2026-10-05 00:00 |
08:37:50.39 |
+55:58:55.8 |
HIP 42297 |
3.44 |
| 2026-10-05 12:00 |
08:37:51.56 |
+55:59:08.8 |
HIP 42297 |
3.60 |
| 2026-10-06 00:00 |
08:37:52.72 |
+55:59:21.9 |
HIP 42297 |
3.76 |
| 2026-10-06 12:00 |
08:37:53.85 |
+55:59:35.1 |
HIP 42297 |
3.94 |
| 2026-10-07 00:00 |
08:37:54.95 |
+55:59:48.5 |
HIP 42297 |
4.12 |
| 2026-10-07 12:00 |
08:37:56.04 |
+56:00:01.9 |
HIP 42297 |
4.31 |
| 2026-10-08 00:00 |
08:37:57.10 |
+56:00:15.4 |
HIP 42297 |
4.50 |
| 2026-10-08 12:00 |
08:37:58.13 |
+56:00:29.0 |
HIP 42297 |
4.70 |
| 2026-10-09 00:00 |
08:37:59.14 |
+56:00:42.7 |
HIP 42297 |
4.91 |
| 2026-10-09 12:00 |
08:38:00.13 |
+56:00:56.5 |
HIP 42297 |
5.11 |
| 2026-10-10 00:00 |
08:38:01.09 |
+56:01:10.4 |
HIP 42297 |
5.32 |
| 2026-10-10 12:00 |
08:38:02.03 |
+56:01:24.4 |
HIP 42297 |
5.53 |
| 2026-10-11 00:00 |
08:38:02.94 |
+56:01:38.5 |
HIP 42297 |
5.75 |