메타데이터
| 항목 |
값 |
| Designation |
89P/Russell 2 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-12-14T20:36:28.673280Z |
| Orbit solution date (soln_date, UTC) |
2025-11-13T13:54:38Z |
| Obs used |
648 |
| NEO |
- |
| M1 |
8.200 |
| K1 |
21.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2018-07-19.0000000 |
| e |
0.40842673 |
| q (au) |
2.220297 |
| a (au) |
3.753208 |
| i (deg) |
12.076267 |
| Ω (om, deg) |
41.443124 |
| ω (w, deg) |
250.178436 |
| M (ma, deg) |
78.773821 |
밝기
산란 + 전체 선형
$$
M_a = (10.324 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.324 |
| n |
6.000 |
| gf |
0.856 |
| gb |
-0.758 |
| k |
0.985 |
| δ90 |
1.000 |
| 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 |
04:27:46.38 |
+27:12:37.8 |
HIP 20933 |
23.79 |
| 2026-05-12 12:00 |
04:28:17.42 |
+27:13:56.9 |
HIP 20933 |
17.27 |
| 2026-05-13 00:00 |
04:28:48.50 |
+27:15:15.8 |
HIP 20933 |
11.37 |
| 2026-05-13 12:00 |
04:29:19.60 |
+27:16:34.6 |
HIP 20964 |
5.21 |
| 2026-05-14 00:00 |
04:29:50.73 |
+27:17:53.1 |
HIP 20964 |
2.12 |
| 2026-05-14 12:00 |
04:30:21.89 |
+27:19:11.6 |
HIP 20964 |
9.00 |
| 2026-05-15 00:00 |
04:30:53.07 |
+27:20:29.8 |
HIP 20964 |
16.03 |
| 2026-05-15 12:00 |
04:31:24.29 |
+27:21:47.9 |
HIP 20964 |
23.07 |
| 2026-05-16 00:00 |
04:31:55.53 |
+27:23:05.7 |
HIP 20964 |
30.12 |
| 2026-05-16 12:00 |
04:32:26.79 |
+27:24:23.4 |
HIP 21333 |
31.06 |
| 2026-05-17 00:00 |
04:32:58.08 |
+27:25:40.9 |
HIP 21333 |
24.02 |
| 2026-05-17 12:00 |
04:33:29.40 |
+27:26:58.3 |
HIP 21333 |
16.99 |
| 2026-05-18 00:00 |
04:34:00.73 |
+27:28:15.4 |
HIP 21333 |
10.01 |
| 2026-05-18 12:00 |
04:34:32.09 |
+27:29:32.3 |
HIP 21333 |
3.42 |
| 2026-05-19 00:00 |
04:35:03.47 |
+27:30:49.1 |
HIP 21333 |
4.82 |
| 2026-05-19 12:00 |
04:35:34.87 |
+27:32:05.6 |
HIP 21333 |
11.62 |
| 2026-05-20 00:00 |
04:36:06.28 |
+27:33:22.0 |
HIP 21333 |
18.62 |
| 2026-05-20 12:00 |
04:36:37.72 |
+27:34:38.1 |
HIP 21531 |
15.03 |
| 2026-05-21 00:00 |
04:37:09.18 |
+27:35:54.1 |
HIP 21531 |
10.25 |
| 2026-05-21 12:00 |
04:37:40.65 |
+27:37:09.8 |
HIP 21531 |
9.18 |
| 2026-05-22 00:00 |
04:38:12.14 |
+27:38:25.4 |
HIP 21531 |
12.80 |
| 2026-05-22 12:00 |
04:38:43.64 |
+27:39:40.7 |
HIP 21531 |
18.55 |
| 2026-05-23 00:00 |
04:39:15.16 |
+27:40:55.8 |
HIP 21699 |
20.72 |
| 2026-05-23 12:00 |
04:39:46.69 |
+27:42:10.8 |
HIP 21699 |
19.38 |
| 2026-05-24 00:00 |
04:40:18.24 |
+27:43:25.5 |
HIP 21699 |
20.56 |
| 2026-05-24 12:00 |
04:40:49.80 |
+27:44:40.0 |
HIP 21699 |
23.88 |
| 2026-05-25 00:00 |
04:41:21.37 |
+27:45:54.3 |
HIP 21699 |
28.60 |
| 2026-05-25 12:00 |
04:41:52.95 |
+27:47:08.3 |
HIP 21988 |
23.41 |
| 2026-05-26 00:00 |
04:42:24.54 |
+27:48:22.2 |
HIP 21988 |
17.21 |
| 2026-05-26 12:00 |
04:42:56.15 |
+27:49:35.8 |
HIP 21988 |
12.02 |
| 2026-05-27 00:00 |
04:43:27.76 |
+27:50:49.2 |
HIP 21988 |
9.69 |
| 2026-05-27 12:00 |
04:43:59.38 |
+27:52:02.4 |
HIP 21988 |
11.99 |
| 2026-05-28 00:00 |
04:44:31.01 |
+27:53:15.4 |
HIP 21988 |
17.17 |
| 2026-05-28 12:00 |
04:45:02.65 |
+27:54:28.2 |
HIP 22207 |
19.97 |
| 2026-05-29 00:00 |
04:45:34.30 |
+27:55:40.7 |
HIP 22207 |
13.07 |
| 2026-05-29 12:00 |
04:46:05.95 |
+27:56:53.0 |
HIP 22207 |
6.62 |
| 2026-05-30 00:00 |
04:46:37.61 |
+27:58:05.1 |
HIP 22207 |
4.17 |
| 2026-05-30 12:00 |
04:47:09.27 |
+27:59:17.0 |
HIP 22207 |
9.57 |
| 2026-05-31 00:00 |
04:47:40.94 |
+28:00:28.6 |
HIP 22207 |
16.32 |
| 2026-05-31 12:00 |
04:48:12.62 |
+28:01:40.1 |
HIP 22409 |
22.43 |
| 2026-06-01 00:00 |
04:48:44.29 |
+28:02:51.2 |
HIP 22400 |
19.47 |
| 2026-06-01 12:00 |
04:49:15.97 |
+28:04:02.2 |
HIP 22400 |
17.01 |
| 2026-06-02 00:00 |
04:49:47.66 |
+28:05:12.9 |
HIP 22400 |
17.33 |