메타데이터
| 항목 |
값 |
| Designation |
C/1972 X1 (Araya) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1972-12-18T23:37:01.591680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:22Z |
| Obs used |
71 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1973-06-27.0000000 |
| e |
0.99949725 |
| q (au) |
4.860840 |
| a (au) |
9668.528147 |
| i (deg) |
113.089959 |
| Ω (om, deg) |
314.886101 |
| ω (w, deg) |
267.211628 |
| M (ma, deg) |
0.000197 |
밝기
산란 + 전체 선형
$$
M_a = (-0.509 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
-0.509 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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 |
18:32:41.24 |
+28:20:11.5 |
HIP 90839 |
11.25 |
| 2026-09-20 12:00 |
18:32:40.90 |
+28:19:53.9 |
HIP 90839 |
11.32 |
| 2026-09-21 00:00 |
18:32:40.57 |
+28:19:36.3 |
HIP 90839 |
11.41 |
| 2026-09-21 12:00 |
18:32:40.25 |
+28:19:18.6 |
HIP 90839 |
11.50 |
| 2026-09-22 00:00 |
18:32:39.95 |
+28:19:01.0 |
HIP 90839 |
11.61 |
| 2026-09-22 12:00 |
18:32:39.66 |
+28:18:43.3 |
HIP 90839 |
11.72 |
| 2026-09-23 00:00 |
18:32:39.39 |
+28:18:25.6 |
HIP 90839 |
11.84 |
| 2026-09-23 12:00 |
18:32:39.13 |
+28:18:08.0 |
HIP 90839 |
11.98 |
| 2026-09-24 00:00 |
18:32:38.89 |
+28:17:50.3 |
HIP 90839 |
12.12 |
| 2026-09-24 12:00 |
18:32:38.67 |
+28:17:32.6 |
HIP 90839 |
12.27 |
| 2026-09-25 00:00 |
18:32:38.46 |
+28:17:14.8 |
HIP 90839 |
12.42 |
| 2026-09-25 12:00 |
18:32:38.26 |
+28:16:57.1 |
HIP 90839 |
12.59 |
| 2026-09-26 00:00 |
18:32:38.08 |
+28:16:39.4 |
HIP 90839 |
12.76 |
| 2026-09-26 12:00 |
18:32:37.92 |
+28:16:21.7 |
HIP 90839 |
12.94 |
| 2026-09-27 00:00 |
18:32:37.77 |
+28:16:03.9 |
HIP 90839 |
13.13 |
| 2026-09-27 12:00 |
18:32:37.63 |
+28:15:46.2 |
HIP 90839 |
13.32 |
| 2026-09-28 00:00 |
18:32:37.51 |
+28:15:28.5 |
HIP 90839 |
13.52 |
| 2026-09-28 12:00 |
18:32:37.41 |
+28:15:10.8 |
HIP 90839 |
13.72 |
| 2026-09-29 00:00 |
18:32:37.32 |
+28:14:53.0 |
HIP 90839 |
13.93 |
| 2026-09-29 12:00 |
18:32:37.24 |
+28:14:35.3 |
HIP 90839 |
14.15 |
| 2026-09-30 00:00 |
18:32:37.19 |
+28:14:17.6 |
HIP 90839 |
14.37 |
| 2026-09-30 12:00 |
18:32:37.14 |
+28:13:59.9 |
HIP 90839 |
14.59 |
| 2026-10-01 00:00 |
18:32:37.11 |
+28:13:42.2 |
HIP 90839 |
14.82 |
| 2026-10-01 12:00 |
18:32:37.10 |
+28:13:24.5 |
HIP 90839 |
15.05 |
| 2026-10-02 00:00 |
18:32:37.10 |
+28:13:06.8 |
HIP 90839 |
15.29 |
| 2026-10-02 12:00 |
18:32:37.12 |
+28:12:49.2 |
HIP 90839 |
15.53 |
| 2026-10-03 00:00 |
18:32:37.15 |
+28:12:31.5 |
HIP 90839 |
15.78 |
| 2026-10-03 12:00 |
18:32:37.20 |
+28:12:13.9 |
HIP 90839 |
16.02 |
| 2026-10-04 00:00 |
18:32:37.26 |
+28:11:56.2 |
HIP 90839 |
16.27 |
| 2026-10-04 12:00 |
18:32:37.34 |
+28:11:38.6 |
HIP 90839 |
16.53 |
| 2026-10-05 00:00 |
18:32:37.43 |
+28:11:21.0 |
HIP 90839 |
16.78 |
| 2026-10-05 12:00 |
18:32:37.54 |
+28:11:03.5 |
HIP 90839 |
17.04 |
| 2026-10-06 00:00 |
18:32:37.67 |
+28:10:45.9 |
HIP 90839 |
17.31 |
| 2026-10-06 12:00 |
18:32:37.81 |
+28:10:28.4 |
HIP 90839 |
17.57 |
| 2026-10-07 00:00 |
18:32:37.96 |
+28:10:10.9 |
HIP 90839 |
17.84 |
| 2026-10-07 12:00 |
18:32:38.13 |
+28:09:53.4 |
HIP 90839 |
18.11 |
| 2026-10-08 00:00 |
18:32:38.32 |
+28:09:36.0 |
HIP 90839 |
18.38 |
| 2026-10-08 12:00 |
18:32:38.52 |
+28:09:18.6 |
HIP 90839 |
18.65 |
| 2026-10-09 00:00 |
18:32:38.73 |
+28:09:01.2 |
HIP 90839 |
18.93 |
| 2026-10-09 12:00 |
18:32:38.96 |
+28:08:43.8 |
HIP 90839 |
19.20 |
| 2026-10-10 00:00 |
18:32:39.21 |
+28:08:26.5 |
HIP 90839 |
19.48 |
| 2026-10-10 12:00 |
18:32:39.47 |
+28:08:09.2 |
HIP 90839 |
19.76 |
| 2026-10-11 00:00 |
18:32:39.74 |
+28:07:52.0 |
HIP 90839 |
20.04 |