메타데이터
| 항목 |
값 |
| Designation |
C/1951 G2 (Groeneveld-Palomar) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1950-07-11T23:45:37.175040Z |
| Orbit solution date (soln_date, UTC) |
2023-07-24T16:29:21Z |
| Obs used |
9 |
| NEO |
- |
| M1 |
5.900 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
1951-04-09T05:11:02.400000Z |
| Discovery magnitude (MPC) |
14.50 T |
| Discovery observatory (MPC) |
711 · McDonald Observatory, Fort Davis |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1951-04-14.0000000 |
| e |
1.00090094 |
| q (au) |
3.638504 |
| a (au) |
-4038.551574 |
| i (deg) |
170.654005 |
| Ω (om, deg) |
354.318294 |
| ω (w, deg) |
108.662689 |
| M (ma, deg) |
0.001060 |
밝기
산란 + 전체 선형
$$
M_a = (4.160 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
4.160 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.566 |
| 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) |
| 2026-03-26 00:00 |
05:49:32.46 |
+14:06:22.7 |
HIP 27504 |
11.19 |
| 2026-03-26 12:00 |
05:49:32.58 |
+14:06:25.7 |
HIP 27504 |
11.25 |
| 2026-03-27 00:00 |
05:49:32.70 |
+14:06:28.7 |
HIP 27504 |
11.30 |
| 2026-03-27 12:00 |
05:49:32.84 |
+14:06:31.6 |
HIP 27504 |
11.35 |
| 2026-03-28 00:00 |
05:49:32.99 |
+14:06:34.6 |
HIP 27504 |
11.41 |
| 2026-03-28 12:00 |
05:49:33.14 |
+14:06:37.5 |
HIP 27504 |
11.46 |
| 2026-03-29 00:00 |
05:49:33.31 |
+14:06:40.5 |
HIP 27504 |
11.52 |
| 2026-03-29 12:00 |
05:49:33.49 |
+14:06:43.5 |
HIP 27504 |
11.57 |
| 2026-03-30 00:00 |
05:49:33.68 |
+14:06:46.4 |
HIP 27504 |
11.63 |
| 2026-03-30 12:00 |
05:49:33.88 |
+14:06:49.4 |
HIP 27504 |
11.69 |
| 2026-03-31 00:00 |
05:49:34.09 |
+14:06:52.3 |
HIP 27504 |
11.74 |
| 2026-03-31 12:00 |
05:49:34.31 |
+14:06:55.3 |
HIP 27504 |
11.80 |
| 2026-04-01 00:00 |
05:49:34.54 |
+14:06:58.2 |
HIP 27504 |
11.86 |
| 2026-04-01 12:00 |
05:49:34.78 |
+14:07:01.2 |
HIP 27504 |
11.92 |
| 2026-04-02 00:00 |
05:49:35.03 |
+14:07:04.1 |
HIP 27504 |
11.98 |
| 2026-04-02 12:00 |
05:49:35.30 |
+14:07:07.0 |
HIP 27504 |
12.04 |
| 2026-04-03 00:00 |
05:49:35.57 |
+14:07:10.0 |
HIP 27504 |
12.10 |
| 2026-04-03 12:00 |
05:49:35.85 |
+14:07:12.9 |
HIP 27504 |
12.16 |
| 2026-04-04 00:00 |
05:49:36.15 |
+14:07:15.8 |
HIP 27504 |
12.22 |
| 2026-04-04 12:00 |
05:49:36.45 |
+14:07:18.7 |
HIP 27504 |
12.28 |
| 2026-04-05 00:00 |
05:49:36.76 |
+14:07:21.6 |
HIP 27504 |
12.35 |
| 2026-04-05 12:00 |
05:49:37.09 |
+14:07:24.5 |
HIP 27504 |
12.41 |
| 2026-04-06 00:00 |
05:49:37.42 |
+14:07:27.4 |
HIP 27504 |
12.48 |
| 2026-04-06 12:00 |
05:49:37.76 |
+14:07:30.3 |
HIP 27504 |
12.54 |
| 2026-04-07 00:00 |
05:49:38.12 |
+14:07:33.2 |
HIP 27504 |
12.61 |
| 2026-04-07 12:00 |
05:49:38.48 |
+14:07:36.1 |
HIP 27504 |
12.68 |
| 2026-04-08 00:00 |
05:49:38.86 |
+14:07:38.9 |
HIP 27504 |
12.75 |
| 2026-04-08 12:00 |
05:49:39.24 |
+14:07:41.8 |
HIP 27504 |
12.82 |
| 2026-04-09 00:00 |
05:49:39.64 |
+14:07:44.7 |
HIP 27504 |
12.89 |
| 2026-04-09 12:00 |
05:49:40.04 |
+14:07:47.5 |
HIP 27504 |
12.96 |
| 2026-04-10 00:00 |
05:49:40.46 |
+14:07:50.4 |
HIP 27504 |
13.03 |
| 2026-04-10 12:00 |
05:49:40.88 |
+14:07:53.2 |
HIP 27504 |
13.11 |
| 2026-04-11 00:00 |
05:49:41.32 |
+14:07:56.0 |
HIP 27504 |
13.18 |
| 2026-04-11 12:00 |
05:49:41.76 |
+14:07:58.9 |
HIP 27504 |
13.26 |
| 2026-04-12 00:00 |
05:49:42.21 |
+14:08:01.7 |
HIP 27504 |
13.34 |
| 2026-04-12 12:00 |
05:49:42.68 |
+14:08:04.5 |
HIP 27504 |
13.42 |
| 2026-04-13 00:00 |
05:49:43.15 |
+14:08:07.3 |
HIP 27504 |
13.50 |
| 2026-04-13 12:00 |
05:49:43.63 |
+14:08:10.1 |
HIP 27504 |
13.58 |
| 2026-04-14 00:00 |
05:49:44.13 |
+14:08:12.9 |
HIP 27504 |
13.66 |
| 2026-04-14 12:00 |
05:49:44.63 |
+14:08:15.6 |
HIP 27504 |
13.74 |
| 2026-04-15 00:00 |
05:49:45.14 |
+14:08:18.4 |
HIP 27504 |
13.83 |
| 2026-04-15 12:00 |
05:49:45.66 |
+14:08:21.1 |
HIP 27504 |
13.91 |
| 2026-04-16 00:00 |
05:49:46.19 |
+14:08:23.9 |
HIP 27504 |
14.00 |