메타데이터
| 항목 |
값 |
| Designation |
C/1992 A1 (Helin-Alu) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1992-07-08T17:12:35.945280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:41Z |
| Obs used |
53 |
| NEO |
- |
| M1 |
12.200 |
| K1 |
4.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1992-02-26.0000000 |
| e |
1.00425169 |
| q (au) |
3.016597 |
| a (au) |
-709.504993 |
| i (deg) |
39.271080 |
| Ω (om, deg) |
288.912404 |
| ω (w, deg) |
239.843091 |
| M (ma, deg) |
-0.006974 |
밝기
산란 + 전체 선형
$$
M_a = (5.138 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.138 |
| 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) |
| 2026-06-01 00:00 |
20:51:36.98 |
+03:26:33.6 |
HIP 102929 |
6.76 |
| 2026-06-01 12:00 |
20:51:36.04 |
+03:26:40.6 |
HIP 102929 |
6.50 |
| 2026-06-02 00:00 |
20:51:35.09 |
+03:26:47.5 |
HIP 102929 |
6.23 |
| 2026-06-02 12:00 |
20:51:34.12 |
+03:26:54.2 |
HIP 102929 |
5.97 |
| 2026-06-03 00:00 |
20:51:33.13 |
+03:27:00.9 |
HIP 102929 |
5.70 |
| 2026-06-03 12:00 |
20:51:32.13 |
+03:27:07.4 |
HIP 102929 |
5.42 |
| 2026-06-04 00:00 |
20:51:31.12 |
+03:27:13.9 |
HIP 102929 |
5.15 |
| 2026-06-04 12:00 |
20:51:30.09 |
+03:27:20.2 |
HIP 102929 |
4.87 |
| 2026-06-05 00:00 |
20:51:29.05 |
+03:27:26.4 |
HIP 102929 |
4.59 |
| 2026-06-05 12:00 |
20:51:27.99 |
+03:27:32.6 |
HIP 102929 |
4.31 |
| 2026-06-06 00:00 |
20:51:26.92 |
+03:27:38.6 |
HIP 102929 |
4.03 |
| 2026-06-06 12:00 |
20:51:25.83 |
+03:27:44.5 |
HIP 102929 |
3.74 |
| 2026-06-07 00:00 |
20:51:24.73 |
+03:27:50.3 |
HIP 102929 |
3.45 |
| 2026-06-07 12:00 |
20:51:23.61 |
+03:27:56.0 |
HIP 102929 |
3.16 |
| 2026-06-08 00:00 |
20:51:22.48 |
+03:28:01.5 |
HIP 102929 |
2.87 |
| 2026-06-08 12:00 |
20:51:21.34 |
+03:28:07.0 |
HIP 102929 |
2.57 |
| 2026-06-09 00:00 |
20:51:20.18 |
+03:28:12.4 |
HIP 102929 |
2.28 |
| 2026-06-09 12:00 |
20:51:19.01 |
+03:28:17.6 |
HIP 102929 |
1.99 |
| 2026-06-10 00:00 |
20:51:17.83 |
+03:28:22.8 |
HIP 102929 |
1.70 |
| 2026-06-10 12:00 |
20:51:16.63 |
+03:28:27.8 |
HIP 102929 |
1.42 |
| 2026-06-11 00:00 |
20:51:15.42 |
+03:28:32.7 |
HIP 102929 |
1.15 |
| 2026-06-11 12:00 |
20:51:14.19 |
+03:28:37.5 |
HIP 102929 |
0.91 |
| 2026-06-12 00:00 |
20:51:12.95 |
+03:28:42.2 |
HIP 102929 |
0.73 |
| 2026-06-12 12:00 |
20:51:11.70 |
+03:28:46.8 |
HIP 102929 |
0.67 |
| 2026-06-13 00:00 |
20:51:10.43 |
+03:28:51.2 |
HIP 102929 |
0.76 |
| 2026-06-13 12:00 |
20:51:09.15 |
+03:28:55.6 |
HIP 102929 |
0.96 |
| 2026-06-14 00:00 |
20:51:07.86 |
+03:28:59.8 |
HIP 102929 |
1.22 |
| 2026-06-14 12:00 |
20:51:06.56 |
+03:29:03.9 |
HIP 102929 |
1.52 |
| 2026-06-15 00:00 |
20:51:05.24 |
+03:29:07.9 |
HIP 102929 |
1.83 |
| 2026-06-15 12:00 |
20:51:03.91 |
+03:29:11.8 |
HIP 102929 |
2.15 |
| 2026-06-16 00:00 |
20:51:02.56 |
+03:29:15.6 |
HIP 102929 |
2.47 |
| 2026-06-16 12:00 |
20:51:01.21 |
+03:29:19.3 |
HIP 102929 |
2.81 |
| 2026-06-17 00:00 |
20:50:59.84 |
+03:29:22.8 |
HIP 102929 |
3.15 |
| 2026-06-17 12:00 |
20:50:58.46 |
+03:29:26.2 |
HIP 102929 |
3.49 |
| 2026-06-18 00:00 |
20:50:57.06 |
+03:29:29.5 |
HIP 102929 |
3.84 |
| 2026-06-18 12:00 |
20:50:55.66 |
+03:29:32.7 |
HIP 102929 |
4.19 |
| 2026-06-19 00:00 |
20:50:54.24 |
+03:29:35.8 |
HIP 102929 |
4.55 |
| 2026-06-19 12:00 |
20:50:52.81 |
+03:29:38.8 |
HIP 102929 |
4.91 |
| 2026-06-20 00:00 |
20:50:51.37 |
+03:29:41.6 |
HIP 102929 |
5.27 |
| 2026-06-20 12:00 |
20:50:49.92 |
+03:29:44.4 |
HIP 102929 |
5.63 |
| 2026-06-21 00:00 |
20:50:48.45 |
+03:29:47.0 |
HIP 102929 |
6.00 |
| 2026-06-21 12:00 |
20:50:46.98 |
+03:29:49.5 |
HIP 102929 |
6.37 |
| 2026-06-22 00:00 |
20:50:45.49 |
+03:29:51.8 |
HIP 102929 |
6.74 |